What is a “Sending Limit”?

Sending limits help to protect ProtonMail’s IP reputation and ensure all messages sent from ProtonMail are delivered in the recipient’s inbox – not the spam folder. Sending limits change based on the reputation of individual ProtonMail accounts. There are many ways to ensure your account has a high sender’s reputation. For instance, upgrading to a yearly paid plan will quickly boost your sending limits. However, behaviors such as bulk emailing or triggering spam complaints will lead to much lower limits. ProtonMail is not designed for bulk/spam emailing.

There are two possible hourly limits ProtonMail accounts can reach. Once a limit is reached, please wait 1 hour before sending again.

  • “Hourly external sending limit reached!” 
  • “Hourly external BCC sending limit reached!”

There are two possible daily limits ProtonMail accounts can reach. Once a limit is reached, please wait 12-24 hours before sending again.

  • “Daily external sending limit reached!”
  • “Daily external BCC sending limit reached!”

Spammer detection message.

  • “You are temporarily banned from sending because of spammy or undeliverable emails.”

In addition to hourly and daily sending limits, ProtonMail implements a smart spam detection system to immediately halt the sending of suspicious accounts. If you receive this detection message, please ensure you are following the tips provided below. You will need to wait 48 hours to continue sending with your account. If you continue to receive this message your account will go under review for deletion. If you believe you have received this message in error, please contact us via the Report Bug.

Here are some helpful tips to ensure you avoid hitting the limits:

  • Start using your email address – the more you use it, the higher your limits will become.
  • Encourage your friends to join ProtonMail – sending messages to other ProtonMail addresses has a much higher limit than sending to outside addresses.
  • Upgrade your account – enjoy all the features that come with ProtonMail Plus, including higher sending limits.
  • Don’t send spam – ensure you are only sending to individuals who you know or are expecting your message.
  • Avoid sending to undeliverable addresses.
  • Avoid using BCC in excess.
  • Update all the information within your ProtonMail account settings.
  • Keep your sending below (please note, these limits are suggestions. Your user reputation (as outlined above) is variable and will determine your unique sending limits):
    • Free Plan: 50 messages*/hour and 150 messages*/day
    • Plus Plan: 300 messages*/hour and 1000 messages*/day
    • Visionary Plan: User’s discretion

 

Please note: Sending Limits do not affect inbound mail (this is unlimited). 

* 10 recipients (any email added to TO, CC, & BCC) within a message counts as 10 unique messages. ProtonMail is currently not designed for high volume sending such as marketing blasts and transactional emails. Any spam sending is a violation of ProtonMail’s Terms and Conditions, making your account subject to review and termination.

 

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29 comments

  1. Wlawlor

    “is aloud to send” above should be “is allowed to send” 🙂

  2. Anonymous

    You mention a limit on “BCC” but not “CC” is there a limit to “CC”?

  3. Dude

    I am trying to share my new email account with my contact list, I believe I ran up to around 50 emails and was shutdown…this is not cool. 50 is way tooo low.. 200 email a day would be more reasonable. Something needs to be done about this limit, as I have contact groups that are over 50. What can been done about this?

  4. Anon

    How do you detect if an email is spam if you supposedly can’t read the emails?

    I’m sure you can tell if an email is exactly the same, but this sounds sketchy.

  5. ProtonMail Support

    We can’t read the content of the messages, there are multiple criteria on which this is being checked.

  6. Mary T. Fisher

    Mary Fisher here again, I think I must have hit the ‘Send’ button by mistake, as I did receive a reply from my friend. Since I had probably hit the wrong button, there would not have bee a draft copy. Automatic save would be a good feature as you are typing. Sorry for the rant, and keep up the good work and be sure and add more features…just lost my job two weeks ago…

  7. K.

    It would be nice if you’d explain precisely what the spending limits are, and how they are calculated.

    I don’t WANT to violate the limits, but unless i know precisely what they are, how can i avoid triggering them?

    I triggered the sending limits at first because i didn’t know they existed. I had more than 25 recipients in BCC, so i got flagged. Like the poster above, i was simply migrating my contacts from another e-mail account, and giving notice that this would be my new one.

    Later, after a couple more tries, i figured out what was going on and i brought the recipients down to 25, and waited until the time period for violating the limit had passed. Then i sent another message with 25 messages – that one go through.

    Then i tried to send ANOTHER message with 25 recipients, and that one got flagged – and i got shut down, again.

    Then, i waited two or three hours, and tried to send another mail with only 6 or 7 recipients – and THAT one got flagged, and i was shut down again.

    Then, i waited nearly 10 hours (after being told i would be shut down for “1 (more) hour”), and tried to send another one with 8 or 9 recipients – and now, i’m shut down again.

    I’m perfectly happy with abiding by the rules, but unless the rules are clearly stated and consistently enforced then i can’t possibly know how to abide by them.

  8. ProtonMail Support

    There are many criteria based upon an account is flagged as suspicious or spam account. We are working on improving this, so the regular users aren’t affected by this. Also we are working on adding an option for notifying your contacts that you have a new email address, so you won’t get flagged by mistke. If you have more questions you can contact us on contact@protonmail.ch or via the Report bug button.

  9. Monday Precious

    I Subscrip about with 30Euro but i could not send mail morethan 100 email so i really don’t know why i paid 30euro

  10. ProtonMail Support

    Hi,
    Can you please contact us at contact@protonmail.com? ProtonMail is not designed for bulk sending.

  11. Juan

    Dear Sirs: I am testing the free account and trying to send an email, it says “You’ve hit the limit on the number of composers you can have open at once.” can someone explain why ???

  12. ProtonMail Support

    Please try refreshing your browser.

  13. Tom

    I’m trying to notify my contact list of my new protonmail, but I got shut down when I tried to send it to 25 people

  14. ProtonMail Support

    The limitations are based on multiple criteria. If you have questions, or need more information you can contact us via the Report bug button.

  15. Mary Fournier

    What’s the plan to send unlimit. Please answer

  16. ProtonMail Support

    For more information about the sending limit for the paid plans, please follow this link: https://protonmail.com/support/knowledge-base/paid-plans/

  17. Ano_87

    I have around a 110 people in my community, and I would like to send them all a massage in BCC. But after 25 addresses I got a limit notification already. Now sending is frozen for 1 hour.
    Is it considered spam if I send 25 BCC addresses each hour till all contacts are e-mailed?

  18. ProtonMail Support

    ProtonMail is not intended for bulk messaging. You can send the update over a longer period of time, and to a fewer addresses to a single message.

  19. AW

    25 recipients per email is ridiculous low, I sometimes need to sent a email to group up to 50 people.
    I paid €48 but it Proton service seems useless.

  20. ProtonMail Support

    The limits are in place so our service is not abused by spammers.

  21. Tom

    I really understand your good intentions to prevent spammers from using this service, but i think, a spammer will not pay (at least) the plus membership fee to be able to send a maximum of 300 spam mails per hour; there are cheaper ways to do that.
    What remains, is a inconvenient behaviour for all your _paying_ customers: i can not send a message to more than 25 recipients (which is really a low value), and i get flagged, if i send a message to more than 100 recipients.
    Sometimes you just want to send e.g. a mail to 120 friends to invite them to your birthday party.
    If this is considered bulk emailing, then yes, sometimes your customers would like to do that!
    Other (free) email providers do not set such strong limits. I personally believe in your product and would really like to continue to use it, since i believe in strong end-to-end encryption, but if the handling consumes too much time, i’m afraid, you will loose exactly these paying customers, who want to fully replace their (free) email solution.

  22. ProtonMail Support

    We apologize for the inconvenience. Spammers abuse all services and often use stolen credit cards. We have implemented some security measures to prevent the abuse of our service. If your account is blocked, please contact us at contact@protonmail.com.

  23. Jerry

    I must ad that i consider these sending limitations completely ridiculous. I would never have signed up for this mail program if i new i was going to be sanctioned or punished for sending more than 25 or 50 emails per hour or what ever it is. We are your customers not your children to punish. I see people are complaining about this that are paid subscribers or customers, Now i wonder why should i up grade if you are still going to restrict how many emails we can send??? It appears that you (proton mail) think we should not have more than 25 people that we care about and want to inform about things that are happening in the world. One more this is completely ridiculous.
    I do not and have not ever knowingly spammed any one.

  24. ProtonMail Support

    ProtonMail is not intended for bulk messaging. The accounts have sending limits to prevent abuse. The premium accounts have higher limits, but they still have limits.

  25. Sandra

    The 25 recipient limit is really too low. I am using this account to communicate amongst parents in a primary school class. It can in now way be classified as “bulk messaging”!!!!!! Please raise this limit to at least 50 or more email messages. I am on a paid account.

  26. Anonymous

    I’m on a paid account and am using this for private communications for a political campaign.

    Without a basic mailing list which should be a simple service I absolutely require a lot more than 25-50 addresses to send out emails. This was never advertised before I paid for the account and I cannot use personal email services which buy/sell my information without second thought.

    Based on the replies from Proton on this thread it sounds like this will never be an offered service for such items and the company would prefer not tot advertise the limitations upfront before we drain our wallets and scramble to figure out why we get locked out of a simple email service.

  27. Anonymous

    Dear Sir/Madam,

    I’m using my proton mail since from 4 months, i just got a error message that my account has disabled due to spam or fraud. I do have important mails and follow up conversations with this domain. So please kindly help me to sort out my proton mail back. I really appreciate your help and suggestions.

    Regards,
    Shekhar

  28. ProtonMail Support

    Please write to abuse@protonmail.ch

  29. John

    Bulk emails can often be avoided, like if you have a birthday party just use Facebook to tell people. For work collaboration tools like Slack and Basecamp are much better suited for online communication.

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