When composing an email one can click on the from line to have a popup window with a list of sender email. I suppose there is one for each defined account.

I would like to know if/how it is possible to have several sending addresses for a single account ? because I need to use different sender email depending on who Im sending (for mailing lists, work, spammers, etc). Or maybe can I have the from line editable in full text maybe ?

troll:
BTW, this seams unproper, according to mails rfcs, to bind the sender's address with the servers used.