On Jan 29, 2009, at 4:54 PM, Magnus Bäck wrote:
You can easily find the relevant log entries by grepping your
maillog for the queue id, which is found in the first Received:
header added by your system. In this case look at this header:
Received: from TRXOMOPC (unknown [77.81.179.110]) by
mail.russellhospital.org (Postfix) with ESMTP id A5D9154C3A7; Thu,
29 Jan 2009 14:32:44 -0600 (CST)
Grep your log for A5D9154C3A7.
Which brings us back to one of my favorite Postfix options:
reject_unknown_hostname
