Rated 5 out of 5 stars

After small issues with 1.2 they were fixed in 1.2.2 now. Now even IMAP Mails work, it just takes a moment to download the attachment from the server, but that is an IMAP and Thunderbird thing - then the encapsulated attachments will appear! This is superb!

This review is for a previous version of the add-on (1.2.2). 

I will look into that but I use IMAP and I do not experience the same issue. Perhaps I have offline setup that downloads the messages.