Rated 4 out of 5 stars

Show InOut is great. I can't use an email client without anymore. It should become part of the main Thunderbird. Version 0.7.3 is not working well on my Thunderbird 3.0.2. Mails sent by me as shown as 'in' someimes. I stepped back to 0.6.2.

This review is for a previous version of the add-on (0.7.3).