I'm using the Android Email app and IMAP/SMTP (not the Gmail app). How can I change the sender ("From") e-mail address? I know how to switch between accounts when sending mail, but I can't find a setting for the e-mail address of each account. Currently, when I send an e-mail, only my username appears in the "From" field (which makes it pretty hard to reply to my e-mails).
The version of the Email app is 4.1.