Postbox

Commercial; $39.95

Current Version: 1.1.5 (June 15, 2010)

Postbox is an interesting commercial email client and Usenet newsreader based on the email technology that underlies Thunderbird. However, it adds a refined user interface and provides advanced message analysis and cataloging functions that make it easier to search and retrieve information on demand. It also includes some social networking features, such as direct integration with Twitter, FriendFeed, Facebook, and Flickr.

Version 1.1.5 introduces the following enhancements over the previous release (1.1.4):

• Several stability fixes
• Memory improvements to make Postbox give back memory more aggressively
• Performance improvements for sending and reading large messages and conversations
• Add the ability to control signatures in message replies and forwards from Tools | Account Settings... | account | Composition & Addressing
• Hide the folder pane when in a message tab
• The mechanism for logging into Twitter has changed. Twitter users will need to log in again via Tools | Web Services...
• Fix an issue with POP3 accounts where checking for new mail failed with an error about the folder is currently being processed
• Fix an issue where copying to the Sent folder would fail
• Fix an issue when dragging a message into the compose window was failing to attach the message
• Fixed an issue with IMAP offline stores larger than 4GB
• Fixed a conversation threading issue where messages were not threaded when they should have been