Review for NoComposeAccount by john2010
Rated 3 out of 5 stars
I have the same situation/problem, and believe a better solution would be, the add-on automatically choose sender depending on the recipient (and the user can manually override when needed). The "rules" of choosing sender from recipient can be determined by a form to fill, where one can use regular expressions or catch-all symbols.
This review is for a previous version of the add-on (0.44pre).To create your own collections, you must have a Mozilla Add-ons account.