Can Mail insert a header into each mail message to specify which account it was received on?
A. Yes, if you display your POP accounts separately in their own mailbox in the drawer (because it’s easy for us to determine which messages belong to a given account). IMAP accounts are not limited by this. Q. How can I set Mail to specify a Reply-To field in messages I send? I tried just changing the “Email Address” field of the account preferences, but if I have two accounts with the same e-mail address, I don’t get the option to switch between them when composing messages. A. Put two addresses in the Email Address field, separated by commas. That should get you what you want. Generally, you don’t want to put a Reply-To: header unless for some reason you want to ‘compel’ the recipient to reply only to you and not other recipients listed in the headers. If you also want multiple Full Names per account, you’re out of luck.
