No way in hell we can recommend Courier anymore. It is simply not good software
Although in general, it is hard to recommend anything other than Cyrus/Dovecot to give reasonable performance

And no reason to give ANY sort of mention of installing a POP3 server.
Bug #11998: Fix occasionally disappearing statusbar
[mms] Horde_Prefs_Identity#getDefaultFromAddress() now returns a Horde_Mail_Rfc822_Address object.
Not needed - this is already done for us in Horde_Core_Factory_Identity

Bug #11997
Bug #11997: Catch mail sending exception when downloading linked attachment