IMAP, SMTP, and POP3 setup

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ProtonMail Bridge is an application that seamlessly encrypts and decrypts your mail as it enters and leaves your computer. It allows you to fully integrate your ProtonMail account with most clients that support IMAP and SMTP protocols, with official support for Microsoft Outlook, Mozilla Thunderbird and Apple Mail.

ProtonMail Bridge also allows you to import emails into your ProtonMail account from other email accounts connected to the same client, as well as run full-text searches of your ProtonMail emails.

ProtonMail Bridge is available on macOS, Windows, and Linux. 

You can download the app, find answers to frequently asked questions and get full support on the  ProtonMail Bridge homepage. To use ProtonMail Bridge, you need any paid ProtonMail plan. if you don’ty have one, you can upgrade.

ProtonMail Bridge uses the SMTP and IMAP protocols. We do not offer POP3 support, but ProtonMail Bridge downloads all your emails into your email client, and you can export them from there.

Learn more about SMTP, IMAP, and POP3

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  1. Al

    I’m thinking about GPG/OpenPGP on client-side. It would be pretty compatible and accessible for everyone solution. And as far as I understand how ProtonMail works, it would require rather simple changes to the crypto system delivered to client’s browsers.

  2. cr

    IMAP option could be used as a less secure but more device friendly version of the account.

    So the Web based version is the secure version

    I MAP version for devices

  3. fornoni

    You could write protonmail plugins for the most popular e-mail clients, such as thunderbird / outlook.

    Another option could be to write smtp server to run locally on the clients (e.g using javascript, such as simplesmtp, you could easily integrate your existing encryption/decryption javascripts).

  4. ProtonMail Support

    We appreciate the suggestions. We will definitely take them into consideration.

  5. zaji

    It would be great if, like my old hosting company, I could set up separate mailboxes in my Apple Mail program for each email address. As it stands, I am only able to use the single Protonmail box that receives all the email addresses I’ve set up for my 3 domains.

  6. ProtonMail Support

    You can set up your account in Apple Mail using the ProtonMail Bridge in Split addresses mode to accomplish this.

    For further assistance, please contact our support team at, or using the support form at

  7. Andrii Kozytskyi

    What about Linux, will in the future the opportunity to create account in Thunderbird? Will Proton Mail application on Linux?

  8. user

    Any idea when imap will be available?

  9. user2

    I would stay away from any legacy IMAP/POP3 support. The more legacy support, the less secure. I plan on moving out of IMAP/POP3 on my domain and use Proton Mail for everything. Maybe their future mobile app will suffice. I’m done with legacy e-mail. It’s time to move on.

  10. Anonymous

    One vote for POP3 access.

    I use PostBox and would love to download my ProtonMail into Postbox — securely, of course.

    A creative solution via an add-on would be fantastic.

  11. Anonymous

    why not make your own protocol and app?

  12. Lance J

    ProtonMail founders should feel FREE to organize + encourage donations/support for a Proton app. We here are working on a patent + business model and may find the longer wait times for new Proton accounts prohibitive for team building. Lack of pop/imap/etc support threatens to bottleneck early growth. We’d LOVE to donate.

  13. erby

    It would definitely increase usability of Protonmail, to have access to Protonmail inbox from native mail clients, by protocol like IMAP over SSL. Problem is, that IMAP, as is currently, is not designed to deal with encrypted inboxes. So, in principle, there is needed to design new standard protocol like IMAP, but with ability to deal with encrypted inboxes. Rather then developing the new protocol completely separately, I think best way would be to try to get in touch with IMAP working group of IETF and help to incorporate the necessary features into new version of IMAP. Of course it will be long run and of course, after new standard eventually published, there will be yet needed time for developers of e-mail clients to implement it, but, from long-term view, it’s the best way. And it’s also way to spread the ProtonMail idea to thousands of implementations of secure e-mail services in the world, which the BigBrother will have hard time to cope with. One ProtonMail, even when based in Switzerland, is, as service, vulnerable to rogue BigBrother goverments (like the US one) attacks by the fact, that it’s one service. Once it would be open-source mail server package, available for free installation on thousands of servers, with internationally standardized and supported encrypted e-mail retrieval protocol to access it, it would significantly help to make BigBrother’s life more miserable….. Just a late evening idea :)

  14. Sputnik

    Dont comprimise…. Keep it safe.

  15. dekadenz

    The most realistic solution will be developing a proxy program/daemon that decrypts mailbox and converts it to regular IMAP. But this will require extra funds for coding.

  16. dekadenz

    Sorry for the double post
    In my opinion you’re solving the wrong problem. This is a browser problem, not mail provider.

    Some browsers (at least Thunderbird/Seamonkey) has built-in SSL support. Annah and Baldur will generate private RSA keys of the strength of their choice (4096 and more) and public keys+certificates with opessl. Those are suitable for encrypting and just signing.

    Overpriced Central Authority cert/key for signing their certs could be bought or they could generate everything yourself and add to “Trusted” list.

    Some companies could do it all for them for a price too.

    Using openssl command line arguments and getting into this certificate bureaucracy is hard but worth it.

    There are also OpenPGP plugin which is simplier, but I prefer built-in encryption.

  17. dekadenz

    Triple post, I apologize again, but the idea is quite different.

    It would be nice to have a nice independent host with a full support of encoded messages I mentioned before. encoding/decoding via JS. And regular IMAP, good clients shold deal with encrypted messages.

    SSL standard itself is outdated, openssl library contains a bunch of nice up to date algorithms.

  18. dekadenz

    I cannot edit my comments, so multiposting again.
    Was trying to say that SSL standard is outdated, but openssl tool contains a load of modern algos so it’ definitely

    To modders/admins, join my multipost with different ideas please.

  19. usur

    IMAP is desperately needed.
    Please work on this feature

  20. Anonymous

    Although I am much in favor of allowing some sort of email client access to the ProtonMail server, I would NOT be in favor of it if it were to diminish the security of the emails or the system in any way whatsoever.

  21. Shayne Jones

    Although I am much in favor of allowing some sort of email client access to the ProtonMail server, I would NOT be in favor of it if it were to diminish the security of the emails or the system in any way whatsoever.

  22. dekadenz

    And at the bottom of this, I don’t mind a good regular mail server without any encryption, protonmail-LITE.

    G and Yandex are the only viable options now, AOL has became buggy and for USA-only, Microsort gives only ugly domains now (no @live any more).

    And good browsers are capable of strong encryption, times stronger than proton can offer (unique keys for everyone and arbitrary strength).

    Just make a good free mail server with IMAP, POP3 and SMTP. We take care of encryption themselves.

  23. Anonymous

    Isn’t IMAP and SSL enought ?

  24. Mr. Doe

    I don’t think IMAP with SSL is enough someone mentioned before. I can’t image the security-level remains the same or increases when there are more access options available (exept for GPG). Its maybe better when there is only this access option. We win a large piece of convenience with IMAP Support but this includes an unknown amount of security risks.
    Just my 2 cents

  25. LAN

    You should create an add-on for Mozilla Thunderbird which would add technologies you use. Or, work with Mozilla to ship those technologies to TB. I think ProtonMail and Mozilla have the same mission (privacy etc.) and you would do well together.

    Hope this will be done soon!

  26. CJ

    Given the aim of security – How about speaking with the guys behind TAILS/TORS

  27. James

    You guys should make the IMAP just as secure as the online.

  28. Jay

    Proton mail’s own App for syncing desktop, tablet, mobile etc with PGP, TLS SSL would be great :D

  29. Freya

    At least send a message that a new mail arrived to the backup E-Mail account?

  30. Anonymous


  31. Anonymous

    A good example of similar functionality is Davmail (smtp/imap exchange gateway). I think, that you can implement something similar, allowing an email client to connect with your application listening on localhost and ecrypting the data in the same way as web browser does. This is an email client independent solution and does not require any plugin implementation. What do you think?

  32. Daniel

    I only miss 2 things with Protonmail… and that’s a manual blacklist/whitelist filter. AND also IMAP/SMTP. And that is worth paying for… and I know they will most likely include it in the future. I hope the free option never will use ads in the future thought.

  33. No pop3, imap or smtp.
    There are many mail services out there provide rather secure pop3, imap or/and smtp service.
    These protocols only require ONE key, which is probably made up of human-readable words or something.
    looking towards PGP

  34. Eben King

    > You could write protonmail plugins for the most popular e-mail clients, such as thunderbird / outlook.

    > You could write protonmail plugins for the most popular e-mail clients, such as thunderbird / outlook.

    I support this approach, with the caveat that one of them be Linux-compatible.

  35. Patryk

    Consider creating WIN/MAC/Linux versionof protocol proxy.
    Simple small service / program that would run as socket proxy encrypting and decrypting in background.
    PROS: you keep PM secure and encrypted up to user’s PC,users can set up ANY mail client do use POP3/IMAP/SMTP and configure to talk @localhost:port
    CONS: have to compile to multi OS’es. Java would be nice but than it wouldn’t be secure anymore :D

  36. Infernoz

    I agree with Daniel and would also be willing to pay when there is proper email client support, not some missing the point mobile app, until then ProtonMail is of limited use to me.

    The best solution is to provide a local IMAP & SMTP translation service for desktop and mobile OSs, which can also support secure LAN use (useful if in a FreeNAS jail).

  37. Patryk

    Make it as simple localhost proxy.
    Starting proto-proxy you would provide username/pass and all contend passing through would be encrypted/decrypted.
    Could be done in two flavors: to emaulate IMAP/POP3/SMTP and talking via ws:// or just proxying those natively.

  38. Patryk

    Thought about how to secure local transmission proxy:
    – for all OS generate random (as in Truecrypt by mouse move) seed
    – for WIN add user SID (+ some PC info?) or hard link to install folder
    – for LIN hard link ID? (inode)
    – for iOS ??
    Random seed + ID from system would create ‘csr’ / client key that would have to be copy-pasted to PM settings. In return signed connection key would be returned.

    Alternate (around) way:

    PM web would generate ‘csr’ That placed and saved into proxy would be signed with system wide ID (think of Windows hardware change detection schema). Such device signed key would have to be pasted back to PM WWW.
    Than every login would be getting stored ID, signing it with system ID and auth against key stored in PM.

    Of course keys could/should? be stored encrypted in device.

    Anyway goal is to make it most easy for users and theft proof.

  39. Anonymous

    Not useful for those who do not have iphones nor android.

  40. some dude

    just wanted to say lack of IMAP is holding me back from moving my personal domain to the service.

  41. Kevin

    I strongly upvote SMTP, with full understanding that it would only be able to send _unencrypted_ emails. When moving my custom domain service over to ProtonMail, I lose the ability for my devices to send me alert emails via SMTP.

  42. User

    I am considering to move my custom domain from gmail to protonmail but the absence of IMAP support stops me. Hope you will implement it soon.

  43. Anonymous

    As others have said above, I’ll be willing to pay, but with a pop3/smtp/imap support. I want people from other email providers to email me PGP encrypted messages and because Protonmail doesn’t allow that, I have to give them my gmail instead.

  44. Luca

    please enable a tor hidden service .onion access to proton mail.
    thank you in advance

  45. Sid

    No SMTP, POP and SMTP!! Totally useless for me, besides Proton is not available for iOS 7!

  46. Sam

    Also strongly in favor of building out Thunderbird support. Otherwise, managing multiple email accounts quickly becomes a tab-hopping pain. The one thing preventing me from migrating to ProtonMail entirely (and upgrading to a paid account) is the lack of support!

  47. waldir

    Tenho apenas o thunderbird, não tenho aplicativos moveis.

  48. Gavin

    Has this stalled or are you working on it?

  49. ProtonMail Support

    We are working on adding this feature, but we do not have an approximate date.

  50. Chris

    When will IMAP/POP/SMTP be included? I need to be able to access multiple accounts from one interface and there does not seem to be a better way to do this.

  51. Zerodayone

    If I could be so kind as to make this suggestion to which I’m hoping the developers of will be so kind to oblige…

    Can you please create a downloadable APK file for installing ProtonMail on Android but without the requirement of going through Google Play?!——-Please?!

    I hate Google and I don’t use Google Play. I haven’t even used the Google search engine in close to a couple of years now—-nor do I ever plan to. There are far better options out there for consumers, of which do not violate personal privacy. The intrusions Google still permits into a person’s online activity are the very reasons why I don’t use Google Play and considering the fact that the main premise of the website and service is to provide private and secure communications.

    Please…the least you could do is provide an exclusive APK file for download like other tech companies whom respect a consumer’s right to privacy do——-Do you expect us all to believe that would be asking too much of

    Your service is predicated upon privacy and security. So please respond in kind by permitting that same option when it comes to our choice of application download.

    Thank you.

  52. Eric Goebelbecker

    I really hope you fix SPAM filtering before spending time making a secure mail option less secure.

  53. sailpriva

    I have a QT/QML-based Jolla/SailfishOS -phone, how could I setup ProtonMail -account in that?

  54. ProtonMail Support

    Our service can be used via a web browser or via the Android/iOS app.

  55. Peter

    Thunderbird addon for Linux would be very helpfully ;-)

  56. Maarten

    Perhaps it would be possible to use standard username/password authentication for the “Login” part of the process, and a client-side certificate for the “Decrypt mailbox” part? That way, you wouldn’t need any custom proxies or other translation service.

  57. John Smith

    Please add at least an IMAP/POP3 feature, it’s annoying that I can’t use an external client to read emails.. thank you :)

  58. quattro2

    I’m joining Protonmail coming from Hushmail which has similar encryption features, but with Hushmail I can add my account on my BlackBerry10 device no problem and get hub integration. My protonmail account won’t add through the usual add-account procedure, but if Hushmail has done it…. I would really like to know I have email on my phone as it arrives, rather than having to login in and check like the very old days….

  59. quattro2

    I have tried to download the APK directly from APKMirror for the same reason as the user above, I refuse to have a Google account for anything. However the APK file seems to not work, it won’t even load, and there was an article posted by an Android group saying they could not get the APK to run on even one of their many devices. So without an app that installs reliably on most devices, having IMAP/POP access is even more important.

  60. Dreamer

    I know there are many guys out there who don’t want to use IMAP/SMTP for security reasons. But I think Protonmail should offer this feature for those who need or simply like it. May it be at our own risk. Make it an option. You use it if you want to. I have mail account on at least three other email providers, and it is unpleasant to go from one place to the other to check mails. With IMAP, I would organize all my accounts in one place using the mail client I like the most. I hope Protonmail gives us this feature soon. :D

  61. kdemeoz

    Hi, thanks for your innovative service, but i’m adding another vote for POP3 support pls. I dislike using webmail & much prefer integrating all my disparate email accounts into my one client [was Outlook, but since recently is Thunderbird / FossaMail]. I have no interest in your iOS/Android app; i prefer centralising all this in my Linux pc, within said client program. POP3 sooner not later please :-)

  62. Francisco A.

    I prefer to have the webmail interface upgraded to resemble (wherever possible) the features offered by Gmail, with ProtonMail privacy and security standards.

  63. Ron Schaffner

    Trying to set up account. Entered Name, password, etc. but seem to be stopped.

  64. ProtonMail Support

    Please contact us on or via the Report bug button.

  65. a_______john

    I totally agree not to compromise security, but also agree that trying to explain private/public keys to contacts is a losing battle. In fact i can barely keep up with all the keys. Im not expert, but it seems imap would ruin the security here. But i would really love some sort of thunderbird integration.

    Perhaps a creative plugin inside of thunderbird (the ‘Neutron’ project was mentioned, not sure how that works), but if somehow a plugin inside of thunderbird could encrypt/decrypt emails to Protons standards, well that would be amazing to be honest.

    I would still opt to force users to put in at least 1 password to access their proton mailbox, opposed to how most normally use thunderbird, 1 click/logon to all accounts. I wouldnt mind at all putting in 1 or 2 passwords each time to have thunderbird integration, but it would be great to just be able to put in my mailbox password on a day to day basis, from my home computer, from inside of thunderbird (or a browser for that matter).

    Thanks again for everything you guys have done for the world, Proton mail is truly revolutionary, in its inventiveness and ease of use, as well as its uncompromising security.

  66. Henry

    Is there any time frame to use ProtonMail with Outlook and Thunderbird?

  67. ProtonMail Support

    We are still looking in to finding the best solution for this feature.

  68. Henry

    Is there a time frame for using ProtonMail with Outlook and Thunderbird?

  69. Henry

    Is there any plan to be able to use ProtonMail with Outlook and Thunderbird?

  70. Henry

    Is there a timeframe for PoronMail working with Outlook and Thunderbird?

  71. jet stream

    Can’t live without encrypted POP3 download access of Proton mailbox to my local e-mail client.

  72. Another user

    Another user needing local access via pop3.
    I’m sure you, @protonmail, can come up with something secure.

  73. Virginia Dorn

    does your company only deal with email servers or do you also provide ssl certificates and domains?

  74. ProtonMail Support

    We do not provide SSL certificates and domains.

  75. Tux

    It would be nice for protonmail to have a feature to download/export all selected emails in bulk as single downloadable file (if not for the free accounts at least for the paid ones). Even if this is done from the browser it would be a huge improvement from where I stand, even if you don’t offer pop3/imap support.

  76. James

    Is there a time frame for using ProtonMail with Outlook and Thunderbird?

  77. ProtonMail Support

    Unfortunately, we do not have estimated date for this feature.

  78. Protonuser

    What about implementing an API? So access using self written web applications would be possible. Would like to integrate a php script to at least send e-mails. Reading mails by script is not that important at the moment.

  79. Yves

    IMAP-version would be useful for those who do use an e-mail software on their personal computer, or a specific app could be developed to be used on personal computers.

  80. jonas

    Is a single specific feature for POP / IMAP / external client access in development, or are you guys @protonmail still undecided and exploring your options? I read the comments, but I didn’t see an explicit answer to this.

  81. ProtonMail Support

    WE are still looking into the available options, but we should have more information soon.

  82. jonas

    That’s great to hear, thank you!

  83. Chris

    As previously stated in a private email, the biggest problem with the app approach is you need to get it from the Google Play Store and the fact it requires the Google Play Services to run.

    In other words, you need to have the spymaster himself running your device in order to use your app.

    Oh, the irony…

  84. ProtonMail Support

    Google Play services are required for the notifications to work. We are looking into other solutions for this.

  85. Anonymous

    This is a bit late reply, but just to say that I run the Android App in LineageOS and apart from notifications and the msg saying it needs google services (just ignore it) it all runs ok. You only see your mail when you open the app, but that is fine with me.

  86. Mist


    I am also interested in moving to Protonmail, but I cannot do so without proper IMAP support. I plan to use Thunderbird with Enigmail/gnupg, and a smartcard to store my private OpenPGP keys on. I would like to see something equivalent to what Countermail people have done i.e. an encrypted inbox that automatically encrypts all incoming email with your public OpenPGP key. You can even choose to remove the private key off their servers, and they also allow you to generate your own pgp key locally + upload just the public part to the servers while the private key never makes contact with the server.

    Can something like this be done for protonmail?

  87. Pablo

    I’m waiting for Thunderbird over a year. Thx

  88. Dangma

    Need to access Protonmail (Send by Email) from Filemaker Pro, thus need SMTP.

  89. Anonymous

    I vote for pop3 and IMAP support.
    ProtonMail needs this to effectively expand its user base.

  90. Matt

    Any official update on this? Really want to use my ProtonMail service with all the awesome new features of the iOS mail app! Wallet ready and waiting :-)

  91. Peter L

    You write:

    Third party email client setup (Outlook, Thunderbird, Apple Mail, Blackberry ect.)

    If you are trying to setup your ProtonMail Beta account with an email you already use, you will be asked for account details. Unfortunately at this time, ProtonMail does not integrate with third party email clients.

    ProtonMail leverages the advanced technology within a browser which allows it’s ease of use. We are working on a solution that will allow you to use ProtonMail with other email clients in the future.

    So my question is:
    what does “We are working on a solution that will allow you to use ProtonMail with other email clients in the future” mean for outlook which I am currently using as client on my PC?
    br Peter

  92. ProtonMail Support

    When we release the solution for third party applications, it should work on most used applications including Outlook

  93. Jose

    IMAP and SMTP access are a big MUST. I would pay for your services, provided that you have this feature (beeing able to import my generated PGP key) and filters.

    IMAP, SMTP, filters and mails encrypted is just what I need from protonmail.

  94. jonas

    Mist asks a great question, I’d love an answer to it.

  95. Anonymous

    +1 for IMAP.

    I’m currently looking for alternatives to my current email service provider, and ProtonMail would be very interesting. Currently I use Thunderbird (and some other clients) with Enigmail / GPG and I’d like to keep using that set up instead of a custom client.

  96. peter l

    Thanks Protonmail support for your response.
    what is expected timeline here to support outlook?
    br Peter

  97. ProtonMail Support

    We do not have an exact time when this will be released, we hope it will be within a few months.

  98. Scott

    We’re a web agency with over 1000 clients on our books – we’re very keen to start recommending protonmail to our customers but offline and mail client support is vital.

    Is there any way we can get a bit more information about how / when this functionality will be rolling out?

  99. ProtonMail Support

    Hi Scott,
    Thank you for your support. We are currently developing this feature. Hopefully it will be released by the end of this year. Unfortunately, we do not have fixed date.

  100. JB Richard

    +1 for IMAP/SMTP support, but I understand it’s not piece of cake. I use Thunderbird, so an add-on there would do the job for me (along with the mobile app). Also, fair point about apk package as opposed to gg play.

  101. Brutus

    I would use this service if I could combine it with a proper email-client!

  102. Perttu Ehn

    +1 for IMAP/SMTP support. It would also make much easier migrate from *any* other regular email provider with the email history.

  103. peka

    I’d suggest creating a PC and Mac client. So, as we already have mobile apps, we need apps for computers. Same thing as on iPhone/Android, but on computers. Do it, please. It’s the securest and best way to do it.

  104. D


    I just opened a Free account it Proton mail. I am planning to use it for test period and then upgrade. IMAP support for Thunderbird or a PC e-mail client would be really useful. Thank you for the great service so far..

  105. J

    As many others said before me, I’d like to see an Protonmail – E-Mail – Programme. In my opinion it’s the only thing limiting a complete migration to Protonmail!

  106. Ulrich

    it is vital to me that I can access my mails with Thunderbird and my Blackberry. I understand that you have to put great effort in providing this service but unless I can use protonmail with my devices it is not suitable for me (or the other way round ;-))
    But thanks anyway for providing such a safe service.

  107. Jon

    um hello this has been going on for 2 years when will we get imap access i will dumping your service i need i map

  108. ProtonMail Support

    We are working on adding this feature, but we do not have an exact date when this will be available.

  109. Paul

    I love ProtonMail. And unlike many of the free loaders moaning on this post “if ProtonMail did this or that I’d switch”, I’m a paying user. Email is just too important to your security or privacy to use a free service that turns you into datamine.

    However, there are cases when offline use is key. Take for example those who live, travel or work in countries where there are oppressive Internet controls, like Iran or China. In these places Internet access can be unreliable because state actors are constantly meddling with people connections and interrupting the VPNs they may be forced to use.

    In these situations, offline mail becomes a key component of the ProtonMail mission.

    Of course, support through a standard protocol would be a huge bonus. I’d even settle for a platform specific interface that provided a local IMAP/SMTP bridge to maintain high levels of security.

    Keep up the good work ProtonMail!

  110. scott

    Would llove to hear of any updates regarding this specific matter. Agree with ulrich, this is necessary for business!

  111. ProtonMail Support

    We are working on this, but we do not have an exact date when it will be available.

  112. João Reis

    I would like to use this email on acme from plan9! :) so, imaps, if you be so kind.

  113. Douglas Arnold

    After a month of repeated hacking. I managed to get both the password and the recovery email wrong. There is no SMS recovery so even thought I bought “plus” I cannot access a barely used. All of my recovery addresses are now proton mail and I have distributed it.
    I can’t find any real support contact on this site unless I log in. Obviously I can’t. I will have to cancel the annual fee and never use this email unless someone gets back to me. I can answer any question about setup including card number but it must be over SMS or the intended recovery address. My username is DMArnold. I would hate to challenge a year subscription just because there is no support at all.

  114. ProtonMail Support

    Can you please contact us at so we can be more of an assistance?

  115. Anonymous

    Hi ! I don’t use very often Protonmail because the login in painfull. I understand the security issues of POP3 accounts, but I would be very happy if the Protonmail team could create a simple email client (send/receive), a dedicated program for PC, only for Protonmail. Thanks a lot for your great idea of an secure email client in this nasty world

  116. Anonymous

    I am looking forward to IMAP support, a proxy that runs a local imap server would be nice, but I would totally accept an addon to popular mail clients. Perhaps you could create a server side API and allow people to innovate.

  117. Anonymous

    Please make it compatible with emclient. I’d pay a subscription.

  118. Anonymous

    I would also love to see IMAP support. Is it also possible that the mobile app can get into the F-Droid app store?

  119. Ni

    Definitely need this feature. A hybrid approach would be fine i.e. imap/pop clients have access to non-ecnrypted emails and opening an encrypted convo should prompt user to use the mobile app and/or browser.

  120. Anonymous

    Looking forward to leaving gmail and moving wholly over to Proton but need some type of offline client. Whether this is a program created wholly by Proton that in addition to securely connecting to Protons servers can also connect to a users other IMAP accounts or a plugin for Thunderbird or other clients. In meantime would be nice to have some customizable default font size settings inside the web version.

  121. ProtonMail Support

    We are working on improving our service, and also on adding this feature. We do not have an exact date when it will be available.

  122. skelband

    Another vote for at least some kind of support for Thunderbird.
    I prefer to keep my emails locally for archival purposes.
    Just trialling Proton Mail for the moment to see how it works out for me.
    Thunderbird support would make me a paying customer almost certainly.

  123. Anonymous

    Same as above, I would also like an IMAP support (Thunderbird) to be able to use and access to my mails in offline.

  124. Anon User

    “Another vote for at least some kind of support for Thunderbird.
    I prefer to keep my emails locally for archival purposes.
    Just trialling Proton Mail for the moment to see how it works out for me.
    Thunderbird support would make me a paying customer almost certainly.”

    This expresses my sentiments perfectly. I just signed up yesterday, but will mostly hold-off until I can integrate it with Thunderbird.

  125. Anonymous

    same here. I need an offline archive. MBOX was never mentioned? If

  126. Wanted to Switch But

    Without IMAP and without import/export, I can’t see any reason to switch my existing mails to Protonmail. I’d assume most users consider privacy focused services like this to move their existing mails and being able to access using a client of their choice. I’m very disappointed that even after two years (like with import/export), Protonmail is not ready enough for people to switch to. I was looking forward to considering a paid plan, but the current features and service are inadequate. I hope you would accelerate the pace of critical feature development that users need.

  127. Anonymous

    IMAP support please, from another Thunderbird user. Compatibility with real email clients (eg gnus) would be better still.

  128. Danielle

    Thank you for your hard work and looking forward for the imap/pop/smtp option to be available on Mac.

  129. Clive

    We would like to switch our company email but need IMAP and import/export facilities.

  130. Mark

    Ideally, I would supply my public key for protonmail to encrypt my emails with and then I’d be able to download my encrypted mails (IMAP/POP) to be decrypted locally.

  131. Kevin

    Any update on this support issue now that One-Password Mode is implemented?

  132. Namkhai Bourquin

    I think that if ProtonMail don’t have IMAP/POP3 or SMTP setup, create a url to compose e-mails, because if would use a mailto link, in Gmail or Yahoo, you have a URL for mailto, or open an application with IMAP/POP3, but if you don’t have IMAP/POP3 or mailto link, you can’t use this link.
    I am spanish, and I write a bad english

  133. Alex

    No Pop nor imap today…
    Waiting on to use Proton as my standard mail provider!

  134. Ignored user

    Is the IMAP thread dead?
    As much as I love Protonmail, I am annoyed by your ignorance.
    Only communication via blog %\, answers are often avoidant, Export/IMAP not working for years!
    I need backups of receipts, passwords etc. I can’t just leave it on a server that will go lavabits at some stage!

  135. Stuart

    New to Proton Mail, would love POP3 / SMTP / IMAP. Security client side will be okay is it’s landing on a disk encrypted at rest,

  136. heywakup

    Still no IMAP/SMTP or POP3 in 2017 ? wtf…

  137. ProtonMail Support

    IMAP support is now available for premium users via the ProtonMail Bridge ( If you need any assistance setting it up, please contact our support team at, via the report bug button or using the support form at

  138. Bill

    I hope support has not waned! I’v got a decades worth of emails and I’m stuck with Outlook for some of my efforts. How are we doing? Any closer to a solution?

  139. John

    PLEASE…IMAP or some way to use my mail client instead of webmail. It’s just such a pain to go to two places to check mail, and double-pain to have to log-in to check ProtonMail and 2-factor authentication. I understand the need for security and privacy, That’s why I paid. But I don’t type well on the phones via the app. And in my situation, I’m not concerned about someone accessing my mail from inside my office…just outside and on internet

  140. ProtonMail Support

    IMAP support is now available via the ProtonMail Bridge.

  141. Baly

    First up: Thanks Proton Team for your service!

    As I cannot seem to find any updates, may I ask if IMAP support is still in Spur roadmap?

  142. ProtonMail Support

    Imap support is now available for premium users via the ProtonMail Bridge app.

  143. brec

    I’ll upgrade when IMAP is available.

  144. ProtonMail Support

    The ProtonMail Bridge is available for premium users on Windows and MacOS, and will soon be released for Linux as well.

  145. Jenna

    IMAP/APPLE Mail/OPEN PGP support please? Need these abilities for archival reasons.
    Once this is implemented? i leave all other services *think Gmail* and come to Proton mail for good.


  146. carburet

    I do not care if it is POP3 or not; though, being able to continue to use Thunderbird would be nice; the most important criteria is that I can somehow store my mail on my own storage device. I cannot imagine having all my mail stuck on some remote server in the event I have no internet access. If all my mail is on my own device, I can get to it at any time without having to worry about connectivity issues. I am not as concerned about it being encrypted on my own device, either; again, that would be nice, but not required. It has been a year since the last comment;

  147. Bogdan

    Where is setting to adjust IMAP for outlook?????????????????

  148. ProtonMail Support

    You can find the instructions on setting up the Bridge and the officially supported clients at the ProtonMail Bridge homepage:

  149. alfajet

    Will the Linux command line version allow 3rd party applications to send emails?

    For instance I have a nextcloud instance and I would like the sender email to be one of my protonmail email addresses? Would that use case be addressed by the cli client?

  150. ProtonMail Support

    If you are able to run the Bridge on the host where your Nextcloud instance is running, then there should be no problem to setup Nextcloud to send email via Bridge SMTP.

  151. Mariano

    As far as I know both Apple mail and Thunderbird have plugins to encrypt / decrypt PGP messages (GPG Keychain for Apple mail and GPG + enigmail for Thunderbird). So standard IMAP / SMTP access should be not an issue. I understand the need of something like the bridge to reach not tech savvy audiences. But some of us are familiar and happy with using PGP on a daily basis, and would love to be able to use our different email providers seamlessly. I think we, regular PGP users, are the natural first target of an email provider such as Protonmail. Why not give us the capability of handling encryption on our own? I’ve seen that Protonmail decrypts correctly those messages I send to myself from another providers encrypted using my Protonmail public PGP key with one of those plugins I mentioned above. So it’s as easy as a simple check on incoming / outgoing messages. If they are already PGP encrypted don’t encrypt them at server side. Does it make sense?

  152. laurent

    Any news of the Linux version of the bridge ? Is there any beta available ?

  153. Steve

    Paid for the professional version. Tried it out with the bridge. Terrible solution! Why not just encapsulate the connection over TLS to your servers and allow the private key for the mailbox to be downloaded and managed on my PGP keyring. Data at rest could easily be encrypted too without this solution. I hate it. I am cancelling my account.

  154. Andrew

    I support the above. In my opinion, Protonmail should allow users to download their mailboxes “as is”, encrypted with GPG and allow to download private key used for such encryption. This way messages can be trivially decrypted by a MUA of choice on client’s side.

  155. ProtonMail Support

    PGP support is currently in active development and should be available soon. Once released, it will add the feature to download your private keys.

  156. Sam

    You state “It allows for full integration of your ProtonMail account with any client that supports IMAP and SMTP” then one paragraph later you state “detailed setup instructions for each of the supported clients.” “supported clients”?! It says only one paragraph earlier “any client that supports IMAP and SMTP”. So which is it?

  157. ProtonMail Support

    For now, only the listed clients are officially supported.

  158. Alexander

    Please, create Docker container based on Alpine for sending emails via SMTP… It will be useful for some internal services like TeamCity, YouTrack, Confluence etc. I would like to create noreply@ Email and use it for sending emails via SMTP for such services. SMTP server will live inside your container on my host. Of course, I have no GUI on server or inside Docker-containers and configuration process should be non interactive as container may be created automatically by script…

  159. Alex

    Its working Whith TheBat ???

  160. ProtonMail Support

    For now, the only officially supported clients are the ones listed in the article, but others may work as well.

  161. Greg

    +1 for a Linux implementation of the bridge daemon
    (OpenSuse Leap 42.2 + KDE/Plasma)

  162. GdeS

    In your FAQ you mention that Protonmail Bridge for Linux will be released this year and also that it is currently only available for paid users. Will that be the case for Protonmail Bridge for Linux when it is released – i.e it will be only available for paid users?

  163. ProtonMail Support

    Yes, the Bridge app for Linux will also be only available to paid users.

  164. Adam

    I signed up as a paying customer so I could use ProtonMail with my own domain and I need SMTP without the need of a bridge because I was planning to use my web address for my online forum. Clearly I can go back to the free account since that does not seem to be an option as you are not going to actually offer SMTP.

  165. ProtonMail Support

    Unfortunately, you can’t use these settings without our Bridge app at this time. Because of the encryption we use, we don’t fully support IMAP/SMTP yet and we utilize our Bridge app to make the connection between your device and our servers.

  166. Cally Sibben

    Very excited for the Linux release, I will definitely upgrade to pro if I can be sure it will work with KMail.

  167. pace

    The service is of course very interesting, i am currently testing this on a number of devices.
    The only issue I see right now is the inability to read messages offline, while on a mac or pc.
    I understand that you have the bridge app, but as this is only for paid users it is somewhat limiting.

    Anyway keep up the great work…

  168. Long-term Supporter

    Can we please please have some urgency on the Linux version of the Protonmail Bridge for Linux please!

    Zero knowledge is great and all but I’m getting seriously concerned about my lack of backup of what is now my primary email account(s).

    I really don’t want to have to write a Selenium scraper, nor would Protonmail much appreciate that kind of load in general I’m sure.

    Any prognostication about when we might see it?

  169. ProtonMail Support

    The ProtonMail Bridge for Linux is currently in the beta stage. For information on becoming a beta tester, please send us a message to

  170. mgurei

    Looking forward for the linux version of the Protonmail Bridge!

  171. DomH

    “The Bridge release for Linux, which will include a command-line interface version, is scheduled for early 2018.”
    It should be very soon, as I consider that early year means that this would be realised before the end of the first trimester.
    I am very impatient to have this version to become a paid users of protonmail and change my VPN to protonvpn.

  172. ProtonMail Support

    If you’d like to test the beta version of the Bridge for Linux, please send a message to

  173. Ken

    One vote for POP3 support in Bridge. I use POP3 as a simple and automated way to archive IMAP email locally, and having this in Bridge would be super convenient.

  174. Anonymous

    Just signed up for an account this morning.
    I’ll also cast my vote for pop3 support at some point in the future, since I prefer the simplicity and control over messages it offers.
    Keep up the great work; building secure software takes time, and I’m alright with waiting for it to be done right.

  175. Keith

    With Outlook 2013, set up the bridge correctly. Outlook test message works fine. I started changing some of my accounts to Proton mail but after a couple of days my Outlook Proton mail folder was still empty, except for the test messages. Logged into Proton Mail online and there sits an inbox full of mail. Why is the bridge not working with Outlook. Please Help

  176. ProtonMail Support

    Please contact our support team at, or using the support form at

  177. Anonymous

    “The Bridge release for Linux, which will include a command-line interface version, is scheduled for early 2018.”

    Support for Evolution would be most welcome.

    Thank you Proton

  178. yvette

    Je ne parviens pas à ajouter un compte “proton” sur mon mobile.
    Après réglages des paramètres entrants le message d’erreur suivant s’affiche : ‘impossible d’établir la connexion au serveur”

  179. ProtonMail Support

    IMAP/SMTP support is only available with desktop email clients and the ProtonMail bridge app. Please use our native iOS or Android ProtonMail app for mobile devices.

  180. Cedric

    About POP3, would it be possible to do “searches” in all downloaded e-mails ?

  181. ProtonMail Support

    Yes, you can search through your messages, along with the message body, in your email client. Please note that ProtonMail does not support POP3, only IMAP is supported via the Bridge.

  182. Onewaytickets

    In Thunderbird. I have entered all the IMAP and SMTP settings correct but when sending a test message through Thunderbird I get the following error message: “The message could not be sent using SMTP server for an unknown reason. Please verify that your SMTP server settings are correct and try again, or contact your network administrator”. Can you assist please?

  183. ProtonMail Support

    Please contact Bridge support at

  184. mrged

    Is the Bridge source code available for review/released under a FLOSS license?

  185. ProtonMail Support

    Our team is actively working on making the Bridge app open-source, it will be in the near future.

  186. Becky

    I’m trying to set up my email to come in through Touchmail on windows 10. I’ve installed the bridge and added the accounts. During setup, it is asking for incoming and outgoing servers. I’ve tried the, but it didn’t work. I uses the example of a server address as this format;

    Can you please provide me with ours, as I’m having a hard time finding them in the guides. None of them seem to be in this format.



  187. ProtonMail Support

    Please contact our Bridge team at

  188. Victor

    Is it possible to communicate with the bridge via any programming language? Python for example.

  189. Tim

    Any ideas on how to keep Thunderbird from continually downloading emails over and over?
    I tried setting the server settings to local folders and it still does the same thing.

  190. ProtonMail Support

    Please contact our support team using the support form at or at

  191. Reto Gasser

    I expected that I found on this website the smtp or pop3 ports, like on gmx

  192. ProtonMail Support

    The ProtonMail Bridge app ( is required in order to use ProtonMail with a desktop email client.

  193. Ramon Navarro

    se puede configurar la cuenta de protonmail en el iPhone , si es posible que se pone en nombre del host , etc

  194. ProtonMail Support

    Please use the ProtonMail app:

  195. ThumbOne

    Waiting eagerly for the Linux client! Awesome work. Look forward to using protonmail in my Thunderbird on Linux!

  196. thijs

    Seems there’s an outdated statement on this page: “The Bridge release for Linux, which will include a command-line interface version, is currently in development.” because lists a Linux client.

  197. ProtonMail Support

    Thanks for catching this! The Linux Bridge is currently in beta and we have updated the article to reflect this.

  198. Anonymous

    I’m looking forward to the Linux client. I want to get protonmail linked into my nextcloud instance.

  199. Stewart Dean

    I wish you had POP support for your Bridge. I’m a paid subscriber and would prefer to download my email and deal with it on my computer’s Thunderbird client. I hate all the work of fighting to manage it on my computer AND on your system, having to clean up my email there. PLEASE POP. Give the email to me and let it be done.

  200. kushang

    can proton mail client work with other mail servers? And if so can I host proton mail client which will be integrated to another mail server.

  201. ProtonMail Support

    No, sorry. You can only use ProtonMail addresses or custom domain addresses added to ProtonMail.

  202. Bruce

    Why is there a problem with POP access?? I thought this had it which is why I signed up.

  203. ProtonMail Support

    POP isn’t supported, only IMAP is via the ProtonMail Bridge. You can find the instructions to set up the ProtonMail Bridge and your desktop email client at

  204. Ciuc

    Hello, I would like to use protonmail in my webshop. Can I use this smtp in woocommerce? How?

  205. ProtonMail Support

    IMAP/SMTP support via the Bridge is only available for supported desktop email clients.

  206. Brady

    Is ProtonMail Bridge the only option to access a ProtonMail account through third party desktop software (i.e. Thunderbird, Spark, Edison Mail, etc.)? I’ve attempted to set up my ProtonMail account without ProtonMail Bridge on Thunderbird and the configuration fails. ProtonMail Bridge states it can only be utilized by paid users, which isn’t a realistic expectation for users who don’t need more than what the free ProtonMail account offers.

  207. ProtonMail Support

    Yes, the only way to have IMAP/SMTP support is via the ProtonMail Bridge and a supported email client. The Bridge handles all the automated encryption and decryption tasks for your account.

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