Changes in v5.101:

• Fixed build problems that caused v5.100 to request the permissions READ_CALL_LOG and WRITE_CALL_LOG

Changes in v5.001:

• Removed SSL/TLS session caching because it was causing problems

Changes in v5.100:

• Removed SSL/TLS session caching because it was causing problems

Changes in v5.000:

• Updated version number to 5.000

Changes in v5.000 RC1:

• K-9 Mail now requires at least Android 4.0.3
• Added support for OpenPGP API v3 (get OpenKeychain)
• Added ability to use client certificates for authentication
• Enabled support for TLSv1.1 and TLSv1.2
• Added SSL/TLS session caching
• Offer encrypted connection by default when manually setting up an account
• Simplified options for authentication and security
• Removed auto-configuration settings for all providers that didn't support encrypted connections
• Added privacy setting to omit the User-Agent header
• Added privacy setting to use UTC as timezone in mail headers
• 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 a slider to allow picking a font size for the message body (40% to 250%) in settings
• Added support for KitKat's Storage Access Framework that allows you to attach multiple files at once
• Multiple bug fixes
• Updated translations

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)

Changes in v4.804:

• Fixed a bug with IMAP Push that could cause excessive battery drain
• Exclude error folder from unread/starred count
• Avoid adding the same recipient twice when using "reply to all"
• Improved compatibility with IMAP (proxy) servers
• Improved support for non-standard conform "share" functionality used by some apps
• Another attempt at working around the display bug on Asus Transformer devices
• Added mailbox.org to the list of providers
• More bug fixes

Changes in v4.904:

• Added support for OpenPGP API v3
• Fixed problems with IMAP login
• Updated translations
• Fixed multiple bugs

Changes in v4.903:

• Offer encrypted connection by default when manually setting up an account
• Simplified options for authentication and security
• Removed auto-configuration settings for all providers that didn't support encrypted connections
• Improved compatibility with IMAP (proxy) servers
• More small fixes and improvements

Changes in v4.902:

• Avoid adding the same recipient twice when using "reply to all"
• Fixed a bug with bitcoin URIs
• Added mailbox.org to the list of providers