On 20.07.17 17:16, Amos Jeffries wrote:
Your DKIM signature covers the Subject and To headers. Any normal
mailing list will modify those,
I disagree - IMHO sane listservers don't modify those headers.
so your server cannot do that on list
postings. Content-Type is also changed sometimes by our listserver
due to the list policy on binary attachments, I dont know whether
that is a common practice too but I suspect it might be. The others
should be fine AFAIK.
This is a better example. However, mailserver supporting DKIM should strip
the DKIM header if it's going to modify anything signed.
Other solution is to refuse message (when the signer domain SKIM policy is
signall).
The other members mailserver does something unusually nasty - it
simply loops the message back at the list instead of bouncing with a
proper error to you. And since your address is still the envelope
sender our server rejects with that loop error bouncing back at you.
which is exactly what I have guessed :-)
And this is why header of original attached message were useful:
Received: from ScrolloutF1.linguitronics.com (203-74-122-103.HINET-IP.hinet.net [203.74.122.103])
by lists.squid-cache.org (Postfix) with ESMTPS id 15AD7E1196
for <squid-users@xxxxxxxxxxxxxxxxxxxxx>; Thu, 20 Jul 2017 03:44:49 +0000 (UTC)
Received: by ScrolloutF1.linguitronics.com (Postfix, from userid 0)
id 3xCfsX5v6DzHpF4; Thu, 20 Jul 2017 11:44:32 +0800 (CST)
Received: from 192.168.1.204 (192.168.1.204:143) by
mailgateway.linguitronics.com with IMAP4; 20 Jul 2017 03:44:32 -0000
Received: from ScrolloutF1.linguitronics.com (unknown [192.168.1.205])
by tw.linguitronics.com (Postfix) with ESMTP id 5A3E64023A
for <spam@xxxxxxxxxxxxxxxxx>; Thu, 20 Jul 2017 11:35:56 +0800 (CST)
Received: from localhost (localhost [127.0.0.1])
by ScrolloutF1.linguitronics.com (Postfix) with ESMTP id 3xCfgc5PKRzHr9d
for <spam@xxxxxxxxxxxxxxxxx>; Thu, 20 Jul 2017 11:35:56 +0800 (CST)
Received: from ScrolloutF1.linguitronics.com ([127.0.0.1])
by localhost (scrolloutf1.linguitronics.com [127.0.0.1]) (amavisd-new, port 10024)
with LMTP id uAebWOExfOQd for <akong@xxxxxxxxxxxxxxxxx>;
Thu, 20 Jul 2017 11:35:55 +0800 (CST)
Received: from lists.squid-cache.org (lists.squid-cache.org [104.130.201.120])
by ScrolloutF1.linguitronics.com (Postfix) with ESMTP id 3xCfgP4p5LzHr9b
for <akong@xxxxxxxxxxxxxxxxx>; Thu, 20 Jul 2017 11:35:39 +0800 (CST)
[yes I wish our sysadmin could stop that bouncing, but the tools seem
to be limited].
removing akong@xxxxxxxxxxxxxxxxx from recipients should fix the problem.
I'm sending Cc: there so the culprit knows what to fix on their side.
--
Matus UHLAR - fantomas, uhlar@xxxxxxxxxxx ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Chernobyl was an Windows 95 beta test site.
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