Neil wrote: > At what point does the "Sender: " header usually get added to the mail? > > Because some (and so far the only pattern is "It shows up when > subscribing to the SpamAssassin Mailing List.") of my mails at getting > that header attached (and with a bad address) and it's annoying me... > The Sender header is optional when Sender and From are equal. It is added by the mail client, not the server.
See RFC2822: http://www.apps.ietf.org/rfc/rfc2822.html#sec-3.6.2 Brian
