Usage: [un]alternates
regexp [ regexp ... ]
With various functions, mutt will treat messages differently, depending on whether you sent them or whether you received them from someone else. For instance, when replying to a message that you sent to a different party, mutt will automatically suggest to send the response to the original message's recipients -- responding to yourself won't make much sense in many cases. (See $reply_to.)
Many users receive e-mail under a number of different addresses. To
fully use mutt's features here, the program must be able to
recognize what e-mail addresses you receive mail under. That's the
purpose of the alternates
command: It takes a list of regular
expressions, each of which can identify an address under which you
receive e-mail.
To remove a regular expression from this list, use the
unalternates
command.