Version 2.13:
- Sorting of messages when clicking on column headers
- Possibility to create folders
- Possibility to drag-n-drop folders and messages
- Button "Delete" added to toolbar

Version 2.14:
- Now when sending text selected on an html page through context menu "Send by Simple Mail", the text formatting is preserved (except for css styles). Also it's possible to send images through this menu. (Actually not an image itself is sent this way but html code )
- Checkbox "Show errors in a popup" added to General preferences.

Version 2.15:
- Switching of main window layout by clicking on "Layout" toolbar button (top-right corner)

Version 2.17:
- Possibility to rename custom folders
- Fixed bug: toolbar icon wasn't updated when mail/no mail status changed

Version 2.18:
- "big5" encoding is added to the list of encodings available when composing a new message
- Chosen encoding is now saved as a default for newly created messages
- When replying or forwarding a message, the encoding of this message is used as a default (this was implemented earlier, but wasn't working due to a bug)

Vesion 2.19:
- A popup window is shown upon receiving of a new message

Version 2.20:
- Fixed bugs with using custom simplemail directory.

Version 2.21:
- Preference "Show new messages in a popup", to be able to turn off this feature.

Version 2.22:
- Parameter "Data directory" added to "Advanced" tab of preferences
- Button "Layout" in main window is replaced by icon
- Similar button is added to new message composition window - it shows/hides additional input fields
- Changed format of mail message whch is created as a reply.

Version 2.23:
- SOCKS-proxy support
- Fixed bug of version 2.22: "CC" & "BCC" headers weren't sent when doing reply/forward.

Version 2.24:
- Now when editing replied message Enter key inserts a break into a quote.

Version 2.25:
- Fixed: messages with no encoding specified used to cause an error

Version 2.26:
- Fixed: sometimes spaces disappeared in text pasted from clipboard.
- Fixed: Opened color palette in new message composition window always showed black color.

Version 2.27:
- Fixed: color still was shown incorrectly

Version 2.28:
- When clicking on new message notification popup box, the new message is focused in the inbox folder.