Thunderbird should add an option where you can click a button to unsubscribe to the selected mailing list. Gmail has this option and it is very helpful.
Agree. Also needs to work on emails in a foreign language. Someone got my credit card and email address and subscribed me to hundreds of listservers, so i got bombarded with emails. But lots of them were in French or Italian or lots of various other languages. I had to copy/paste many of the emails into google translate to figure out which links were for unsubscribing.