On Tue, 28 Mar 2017 19:49:10 +0100 Markus <mar...@clardy.eu> wrote: > Honestly didn't even think of mailing lists such as this, nor BCC > (don't deal with BCC emails very much to be honest).
> Though, would you not be able to test against the bottom most > Received header compared to the To: header? The "for..." clause is optional and a lot of MTAs don't add it. Almost all MTAs will refuse to add it if it's for more than one local recipient. Regards, Dianne.
