proton-mail-bridge
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Description:
Bridges Proton Mail to email clients supporting IMAP and SMTP protocols
Type: Cask  |  Latest Version: 3.22.0@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @protonprivacy  |  formulae.brew.sh
Category: Networking
Tags: proton email encryption imap security
Install: brew install --cask proton-mail-bridge
About:
Proton Mail Bridge creates a secure local IMAP and SMTP server on your device, encrypting and decrypting emails on the fly. It enables seamless integration of your encrypted Proton Mail account with standard desktop email clients like Apple Mail, Outlook, and Thunderbird. This allows for offline access and advanced email management while maintaining Proton's end-to-end encryption security.
Key Features:
  • Local IMAP/SMTP bridge for desktop clients
  • Automatic encryption and decryption of emails
  • Offline access to your mailbox
  • Seamless integration with standard email applications
Use Cases:
  • Using Proton Mail with Apple Mail or Microsoft Outlook
  • Managing emails offline without a web browser
  • Integrating encrypted email into existing email workflows
Alternatives:
  • Proton Mail Web App – Bridge allows local client use, while the web app is browser-based.
Version History
Detected Version Rev Change Commit
Feb 9, 2026 1:38pm 3.22.0 0 VERSION_BUMP 8b9acd85