Brilliant Rated 5 out of 5 stars

Great extension, another that makes you wonder why it isn't built into TB in the first place. The author's page describes how to change the formatting for In and Out mails and also how to change the icons to make them easier to distinguish. I format 'Out' details in italic and slightly smaller font and point to a non-existent icon for outgoing mails so it doesn't display an icon, to make In and Out easier to recognise.

This review is for a previous version of the add-on (0.6.1).