[Mailman-Users] Domain in the To: header

Brad Knowles brad at stop.mail-abuse.org
Fri Sep 24 22:39:26 CEST 2004

At 1:58 PM +0100 2004-09-24, Jolin M Warren wrote:

>  In every case I have checked, this is the address that is being entered
>  into the 'To:' field of the sender's mailer. However, some MTAs seem to
>  be automatically substituting the CNAME for the domain in the To: address,
>  so the email that arrives at my server has the To: address of:

	They are doing so correctly.  This behaviour is required by the 
RFCs.  If you don't want this done, have the name resolve directly to 
the appropriate IP address and not a CNAME alias to a different name.

Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.

More information about the Mailman-Users mailing list