Review for SmtpSwitch by Calimo
Rated 1 out of 5 stars
This add-on used to be very nice and useful, however it stopped working recently (now with Thunderbird 17.0 on Linux Ubuntu 12.10 64bits). Now whatever SMTP you choose it will always send emails with the default server for the account.
To create your own collections, you must have a Mozilla Add-ons account.