Desktop notifications

Enable Desktop Notifications We offer a notification feature that allows you to receive desktop notifications while you are logged in to your ProtonMail account. The first time you log in on the latest version of ProtonMail you will be asked by your browser if you want to allow ProtonMail to […]

Read receipts

A read receipt informs the sender that the recipient has seen the email. ProtonMail enables you to request read receipts from the recipient of your email. Once the request has been sent, the recipient has the option to accept or decline the request. If they choose to accept it, you […]

Update required

Our developers regularly release software updates that improve the security, reliability, and user experience of ProtonMail. Most of these new versions are recommended but not strictly required. On some occasions, however, we will release versions of our software that are required for all users. A required update means that any […]

Email bomb mitigation

An email bomb is a kind of online attack in which the attacker sends a massive amount of emails to a specific address or computer network in order to overflow the inbox of the recipient. An increasingly common form of this attack consists of bombarding the user mailbox with signup […]

Sender Verification Failed

Note: This article refers to a feature that is still in beta and not yet released on the public version of ProtonMail. ProtonMail employs different methods to protect your privacy and your security. One method of protecting messages from being read by outsiders is encryption. However, encryption alone does not […]

Address verification with trusted keys

ProtonMail distributes all of the cryptographic keys that are needed for communicating between users. This ensures that any ProtonMail user can seamlessly encrypt mail to any other ProtonMail user, with no possibility of data being intercepted. This approach ensures that all internal ProtonMail communications are encrypted, but it requires our […]

How to use PGP

PGP is a proven method of protecting email communication with end-to-end encryption (which prevents emails from being read by any third parties, including your email provider). Historically, PGP was difficult to use, and impossible for most users to set up and regularly use for their own email communications. We have […]

Accessing onion sites in Firefox

Tor is a hidden network that encrypts and anonymizes your internet connection, giving users improved security and privacy. ProtonMail provides email access over the Tor network through our onion site through our version 3 address. You must be connected to Tor to access the ProtonMail onion site. You can do […]

Operating systems supported by Bridge

Bridge is supported on Windows 7 and above and on macOS 10.12 (Sierra) and above. For Linux, Bridge is available for the DEB, RPM and PKGBUILD-related distributions, covering most derivatives. (debian and all derivatives like Ubuntu, Mint; RedHat and derivatives like Centos or Fedora; Arch and derivatives like Manjaro) Download […]