Martin Kellermann put forth on 12/2/2010 6:08 AM: > and there's a 5 sec. delay ... seems way too long to me for just > checking the recipient...!?
That delay should be no longer than what a typical delivery to the Exchange server would be. Since no message is sent, it should be shorter by quite a bit. I would guess the delay is within the Exchange server, not Postfix, so you may need to do some sleuthing on the Exch server to see what it causing the delay. > PS: should unverified_recipient_reject_code set to 450 or 550 ? You should probably leave this at the defaults. As I understand it, the default configuration will return a 5xx for "unknown user" and a 4xx if the query fails, due to network, etc. -- Stan
