- enigmail 1.9.3:
* Fix Decrypt loop with S/MIME self-signed mails
* Fix Manage UIDs throws errors if called from key properties dialog
* Fix No error message if configured key not found on keyring
* Fix Enigmail munges display of messages with S/MIME signature
* Allow importing of expired keys

- enigmail 1.9.2:
* Add support for Zimbra OpenPGP encrypted messages
* Fix decrypt loop with S/MIME signed mails
* Fix silently failing import of revocation certificate
* Fix E-Mail saved as draft and reopened will show empty message
* Fix multipart/signed mail without micalg parameter blank body
* Fix display of changed key expiration date

- enigmail 1.9.1:
* fix recignition of MS Exchange messages
* fix slow PGP/MIME signature verification with attachments
* fix freeze with large mail with signature
* fix backup/restore UI
* fix UI issues with German umlauts

- enigmail 1.9:
* Added support for GnuPG 2.1
* Backup and restore of keys and Enigmail settings
* Messages are sent using PGP/MIME by default
* Several new dialog windows that improve usability
* Added support for protected headers (off by default)
* There is no binary component anymore - this version runs on all
platforms for which Thunderbird and GnuPG are available.