Rated 2 out of 5 stars

Works good for most mails. For some mails (usually direct mails (sender and receiver from same domain)) weird route is shown and IP addresses and domain names are shown which are not contained in the source of the mail. No, means to file bug report or contacting anybody. How disappointing.

This review is for a previous version of the add-on (0.8.2). 

http://www.mailhops.com/contact or https://github.com/avantassel/mailhops-thunderbird/issues