Christopher Adams wrote:
Can someone clue me in as to what might be causing this? A person sent
a message to a mailing list named Xlist. There is nothing nonstandard
about Postfix, no Virtual Hosts. I need to know where the fault lies.
I call my server '[EMAIL PROTECTED]'. I have a general idea of what
a mail forwarding loop is, but I just need to be clear with the
customer about it. This is what the sender received back:
Diagnostic information for administrators:
Generating server: myserver.domain.com
[EMAIL PROTECTED]
#< #5.4.6 X-Postfix; mail forwarding loop for [EMAIL PROTECTED]> #SMTP#
It's more informative to see what postfix logs.
Original message headers:
...
delivered-to: [EMAIL PROTECTED]
If that delivered-to: header was in the mail that postfix
received, postfix will treat it as a loop and bounce it.
That header should only be added by a final delivery agent,
and should never be in mail arriving from the network.
My wild guess is that some broken software is adding that
header, postfix uses caps. Delivered-To:
It's possible to use a header_checks rule with the IGNORE
action to remove the offending header, but that's not recommended.
--
Noel Jones
