Releases of the light and fast mail client Claws Mail 3.19.0 and 4.1.0 were published, which in 2005 separated from the Sylpheed project (from 2001 to 2005 the projects were developed jointly, Claws was used to test future Sylpheed innovations). The interface of Claws Mail is built using GTK, the code is distributed under the GPL license. The 3.x and 4.x branches are developed in parallel and differ in the version of the GTK library used - the 3.x branch uses GTK2, while the 4.x branch uses GTK3.
Key innovations:
- Support for text scaling has been implemented in the message viewing interface. The scale is changed with the mouse wheel while holding down the Ctrl key or through the context menu.
- The GtkColorChooser widget is used in the spell checker, color mark selection, and folder properties to select colors.
- Added 'Default From:' parameter to folder properties to override the default address used when composing messages.
- Added an option to folder properties to exclude a folder when searching for new and unread messages.
- Added 'By Sender' parameter to filter rules and message processing rules.
- Added option to run processing rules before marking all messages as read or unread.
- Added the ability to place a button on the toolbar for executing folder processing rules.
- In the list of links mentioned in the letter, it became possible to place addresses on the clipboard and select several links. Phishing addresses are marked in red.
- Improved tag handling.
- Improved storage of OAuth2 tokens.
- The "View all" button has been added to the theme settings to preview all theme icons.
- The term 'master passphrase' has been replaced by 'primary passphrase'.
- Files with logs, history, and saved items now have permissions set to 0600 (read and write only for the owner).
- Added "Keyword Warner" plugin that displays a warning when user-specified keywords are found in the message.
Source: opennet.ru