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Proton Mailbridge Release Notes

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Last updated: Feb 16, 2026

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  • Feb 11, 2026
    • Date parsed from source:
      Feb 11, 2026
    • First seen by Releasebot:
      Feb 16, 2026

    Proton Mailbridge by Proton

    v3.22.0

    New

    • Helpful tooltips when copying IMAP/SMTP settings to clipboard.
    • Increased the maximum message import size limit to 50MB.
    • Added support for hardware security keys (FIDO2) for two-factor authentication.

    Changed

    • Improved reliability when importing emails.
    • Improved password storage reliability on all platforms.
    • Improved reliability during long-running mail operations.

    Fixed

    • Fixed an issue that could cause Bridge to crash when importing certain messages.
    • Fixed an issue where imported emails could be altered.
    Original source Report a problem
  • Jul 21, 2025
    • Date parsed from source:
      Jul 21, 2025
    • First seen by Releasebot:
      Feb 16, 2026

    Proton Mailbridge by Proton

    v3.21.2

    Changed

    • Improved security by not allowing potentially invalid certificates to be accepted.
    Original source Report a problem

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  • Jun 18, 2025
    • Date parsed from source:
      Jun 18, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.21.1

    Bridge now runs a quick startup database health check to catch issues early, fixes label and folder sync reliability, and improves mailbox handling with better error detection and fewer sync issues.

    New

    • Bridge now performs a quick database health check on startup to catch potential issues early.

    Fixed

    • Resolved issues regarding labels and folders not always syncing correctly.

    Changed

    • Mailbox handling is more reliable, with better error detection and fewer sync issues.
    Original source Report a problem
  • May 15, 2025
    • Date parsed from source:
      May 15, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.20.0

    New detailed local logging for label ops and vault keys; Bridge now remembers the last Linux keychain helper. Robust login credential handling. Fixed autostart shortcut for Windows usernames with special chars; improved reliability when many mail changes come from other clients.

    New

    • Added more detailed local logging for label-related operations and vault key information.
    • Bridge now remembers the last keychain helper used on Linux.

    Changed

    • Username and password handling during login is now more robust.

    Fixed

    • Fixed autostart shortcut creation on Windows for usernames with special characters.
    • Improved reliability when many mail changes are made from other clients.
    Original source Report a problem
  • Apr 1, 2025
    • Date parsed from source:
      Apr 1, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.19.0

    Changed

    • Security and compatibility upgrade for the graphical user interface.
    Original source Report a problem
  • Mar 6, 2025
    • Date parsed from source:
      Mar 6, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.18.0

    Changed

    • Revised update logic to account for supported operating systems.
    Original source Report a problem
  • Feb 19, 2025
    • Date parsed from source:
      Feb 19, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.17.0

    Changed

    • Updated Go to version 1.23.4.
    • Various dependency updates.
    • Improved email update mechanism during initial synchronization.

    Fixed

    • Cut and paste options no longer appear in read-only text fields.
    Original source Report a problem
  • Jan 13, 2025
    • Date parsed from source:
      Jan 13, 2025
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.16.0

    New IMAP AUTHENTICATE PLAIN support; preserves order of multi-valued email headers; clears cached data when removing an account from Bridge; improved human verification prompts; restored -h CLI help flag; fixed rare draft creation/update/send issues during synchronization.

    New

    • Added support for IMAP AUTHENTICATE PLAIN.

    Changed

    • Email headers with multiple values now retain their original order.
    • Remove all cached data when an account is removed from Bridge.
    • Enhanced the user experience for Human Verification Prompts.
    • Restored the -h (help) flag in the CLI.

    Fixed

    • Addressed rare issues with creating, updating, and sending drafts during and after synchronization.
    Original source Report a problem
  • Dec 11, 2024
    • Date parsed from source:
      Dec 11, 2024
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.15.1

    Fixed

    • Disable the keychain test on macOS.
    Original source Report a problem
  • Nov 25, 2024
    • Date parsed from source:
      Nov 25, 2024
    • First seen by Releasebot:
      Sep 17, 2025

    Proton Mailbridge by Proton

    v3.15.0

    This release adds a macOS option to hide the Bridge tray bar icon, adds new CLI help parameters, updates the macOS profile installation dialogue for the new macOS version, and fixes edge cases in message import, draft creation, and email sending.

    New

    • Added an option to hide the Bridge tray bar icon on macOS.
    • Added new parameters to the CLI help command.

    Changed

    • Adjusted the macOS profile installation dialogue to reflect the new macOS version profile installation changes.

    Fixed

    • Enhanced message importing, draft creation and email sending for rare edge cases.
    Original source Report a problem

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