Very helpful but... Rated 5 out of 5 stars

...there is one thing that ist a bit annying to me:

I have a lot of email accounts. Some of them I use very often, but most of them I only use from time to time. When I get a new email notification and click on it, I am being asked to enter my username and password for every account. It would be fine, if that only happened for the accounts where I have the "check for messages on startup" checked in the server settings - or for the accounts, which I am currently logged in.

On the other side, this is a very great and helpful add-on! Thank you for this.

Ruediger

This review is for a previous version of the add-on (2.6.3). 

I suspect that's not related to my addon. However, disabling the unified inbox (View > Folders > All in the menus) may help.