Changes in v4.905:
- Dropped support for Android versions older than 4.0.3
- Added ability to use client certificates for authentication
- Enabled support for TLSv1.1 and TLSv1.2
- Added SSL/TLS session caching
- Finer grained control for notifications
- Added support for delete confirmations in the message list
- Added the option to show the password when setting up new accounts
- Added privacy setting to omit the User-Agent header
- Added privacy setting to use UTC as timezone in mail headers
- Added auto configuration settings for various providers
- Fixed HELO/EHLO with IPv6 address literals
- Various bug fixes
- Added translations: Latvian, Estonian, Norwegian Bokmål, Galician (Spain)