ProtonMail Bridge is an intermediary program for Proton Mail users. It allows you to access your mailbox from any mail client installed on your computer, even if this program does not support encryption. ProtonMail Bridge works like a local mail server.

He communicates with the ProtonMail and the data transfer between it and the "bridge" is fully encrypted. The mail client can connect to the local server via IMAP and SMTP protocols. Communication with them takes place only within the system.

After Bridge is installed, you need to provide Bridge with information about your ProtonMail account, and then provide it in the mail client. With Bridge, ProtonMail users can check their mail in the same place as their other mailboxes, using the benefits of their favourite mail client. In addition, you can use the full text search in your encrypted e-mails.