Multiple email accounts for single user

My apologies for bumping this old thread. I know a lot of work has been going into Discourse to boost e-mail support lately, and one of the problems I’ve found managing mailing lists is that users often submit email from the wrong email account. It would be very handy to have alias emails so that when they submit emails to the server, they are accepted instead of bounced with a terse message (which is what happens now).