Spruce is an X11 email client written in GTK+. It is geared towards being small and fast, supporting all the common features that users want or need without sacrificing usability or functionality.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This version adds support for PGP clear-signing and preliminary support for SSL with POP and IMAP. Spruce will now warn users of problems via warning dialogs rather than console messages and there is a new feature that allows a user to have Spruce beep when new mail arrives.
This release includes major improvements to PGP encryption/decryption support - now supports GnuPG, PGP 5 and PGP 2, ability to edit your addressbook information, more word-wrap functionality, the ability to convert tabs to a set number of spaces, and numerous bugfixes.
This release adds In-Reply-To and References headers to outgoing messages in order to not break message threads on mailing lists. It should also now build on FreebSD systems, and fixes the SMTP issues that a few people were having.
Fixes to allow Spruce to build on Solaris7 SPARC stations, fixes for segfault bugs that occured when a user deleted the last remaining message in a folder and when users sent mail on certain systems, and completion of polishing up the new mailbox code.