See the full release notes within MailMate. Here is a short list:
- Improved mailbox search. Most importantly, you can now store a default set of search conditions.
- Improved completion of addresses in the composer.
- Support for SMTP authorization via the LOGIN method (important for SMTP servers which do not support PLAIN).
- Fixed bug related to deletion of spam. Make sure you read the release notes if you use SpamSieve.
- Various other changes and bug fixes.