How does one use Thunderbird as a ghost client for a virtual email address? The point being that one uses his own smtp server, and inbox but the from and replyto address are for another address, so that when one replies to the replyto email address, it automatically bounces to the user's own inbox and thus it appears like the virtual email address exists to outsiders, but in reality is an alias to another email address? Apparently it is some setting on the thunderbird client, but I do not know what it is.