• Deletion receipts - Message Delivery Notification (MDN);
• Delivery receipts - Delivery Status Notification (DSN);
• Encryption/Signing with triple wrapping;
• RFC 2634 Security Labels and Signed Receipts;
• Address autocompletion with several LDAP directories;
• CRL download from LDAP directories;
• Manage Out of Office settings on a Sieve server;
• ...

→ Full list, documentation and screenshots

• Find and report new issues in the bug tracker.
• Write and propose new translations or correct style/spelling mistakes in user interfaces or documentation.
• You have ideas: share them in the forums.
• Develop new features and submit them to the project. Get the source code from the Git repository.
• Test add-ons and write reviews on addons.mozilla.org.
• Contribution tracker.

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