We might need to add a knob to the smtp transport that says to not group different domains per recipient MX. The question is whether we think this is enough of an issue to add this or if the existing queue management compensates for Google's local policy. I assume some of that answer will depend on the volume that any particular $SENDER is actually moving in their direction.
...Todd ---------- Forwarded message ---------- From: Andy Davidson <[email protected]> Date: Thu, May 24, 2012 at 7:35 AM Subject: [mailop] Google - multiple domain deliveries - new behaviour ? To: [email protected] Hi, I run a number of busy mailing lists, and debugged some slow delivery complaints this morning. I group email delivery per destination MX host using Exim, so that if xxx.com and yyy.com point to the same MX server, they can be delivered in the same SMTP transaction. I have noticed today that google do not allow multiple domain names in the same transaction any more : 2012-05-24 15:31:22 1SXZ2G-0004ka-D4 SMTP error from remote mail server after RCPT TO:<[email protected]>: host aspmx.l.google.com [173.194.79.26]: 451-4.3.0 Multiple destination domains per transaction is unsupported. Please\n451 4.3.0 try again. op2si1498187pbc.196 2012-05-24 15:31:26 1SXZ2G-0004ka-D4 SMTP error from remote mail server after RCPT TO:<[email protected]>: host aspmx.l.google.com [173.194.79.26]: 451-4.3.0 Multiple destination domains per transaction is unsupported. Please\n451 4.3.0 try again. op2si1498187pbc.196 2012-05-24 15:31:26 1SXZ2G-0004ka-D4 SMTP error from remote mail server after RCPT TO:<[email protected]>: host aspmx.l.google.com [173.194.79.26]: 451-4.3.0 Multiple destination domains per transaction is unsupported. Please\n451 4.3.0 try again. op2si1498187pbc.196 Is this correct behaviour, in other words have I been trying to do something incorrect all along ? Why would they do this ? Is there a whitelist mechanism ? Andy _______________________________________________ mailop mailing list [email protected] http://chilli.nosignal.org/mailman/listinfo/mailop -- Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live. -- Martin Golding -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
