Re: [Undeliverable: Re: Mailing lists and Discourse]

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On Thu, Oct 27, 2022 at 03:17:31PM -0700, Samuel Sieb wrote:
On 10/27/22 15:11, Wolfgang Pfeiffer wrote:
Received: from pop.gmx.net [212.227.17.185]
    by aw17 with POP3 (fetchmail-6.4.31)
    for <[deleted local user name]@localhost> (single-drop); Wed,
26 Oct 2022 20:13:48 +0200 (CEST)
Received: from EUR04-HE1-obe.outbound.protection.outlook.com
([40.92.73.83])
 by mx-ha.gmx.net (mxgmx105 [212.227.17.5]) with ESMTPS (Nemesis) id
 1MRVu9-1oSUk40C4j-00NTdY for <roto@xxxxxxx>; Wed, 26 Oct 2022
19:47:01 +0200

This undeliverable message is coming from outlook.com, not the mailing list.

Diagnostic information for administrators:

Generating server: PR3P189MB1017.EURP189.PROD.OUTLOOK.COM

y.antoniowatson@xxxxxxxxx
Remote Server returned '550-5.7.26 The MAIL FROM domain [gmx.net]
has an SP=
F record with a hard fail 550-5.7.26 policy (-all) but it fails to
pass SPF=
 checks with the ip: 550-5.7.26 [104.47.13.56]. To best protect our
users f=
rom spam and phishing, 550-5.7.26 the message has been blocked.
Please visi=
t 550-5.7.26
https://support.google.com/mail/answer/81126#authentication fo=
r more 550 5.7.26 information.
r20-20020a05640251d400b0045d4b7ad162si680198=
1edd.546 - gsmtp'

This is the problem.  The server either doesn't like the SPF policy or
the received message fails the SPF policy.  Maybe the mailing list
admins will have to add gmx.net to the list of hidden senders.

Which server does not like GMX: gmail.com, outlook.com? - I didn't
send anything to both of them: here's the complete sendmail log for
the respective mail transfer:

-----------------------
Oct 26 19:46:03 aw17 sendmail[581085]: 29QHk3BI581085: from=roto@xxxxxxx, size=1738, class=0, nrcpts=1, msgid=<Y1lyW5vQH38/PuKq@localhost>, relay=[local user name deleted]@localh
ost
Oct 26 19:46:03 aw17 sendmail[581085]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1.3, verify=FAIL, cipher=TLS_AES_256_GCM_SHA384, bits=256/256
Oct 26 19:46:03 aw17 sendmail[581086]: STARTTLS=server, relay=aw17 [127.0.0.1], version=TLSv1.3, verify=NO, cipher=TLS_AES_256_GCM_SHA384, bits=256/256
Oct 26 19:46:18 aw17 sendmail[581086]: 29QHk34B581086: from=<roto@xxxxxxx>, size=1907, class=0, nrcpts=1, msgid=<Y1lyW5vQH38/PuKq@localhost>, proto=ESMTPS, dae
mon=MTA, relay=aw17 [127.0.0.1]
Oct 26 19:46:18 aw17 sendmail[581085]: 29QHk3BI581085: to=users@xxxxxxxxxxxxxxxxxxxxxxx, ctladdr=roto@xxxxxxx (1000/1000), delay=00:00:15, xdelay=00:00:15, mai
ler=relay, pri=31738, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (29QHk34B581086 Message accepted for delivery)
Oct 26 19:46:28 aw17 sendmail[581215]: STARTTLS=client, relay=mail.gmx.net., version=TLSv1.3, verify=OK, cipher=TLS_AES_256_GCM_SHA384, bits=256/256
Oct 26 19:46:29 aw17 sendmail[581215]: 29QHk34B581086: to=<users@xxxxxxxxxxxxxxxxxxxxxxx>, delay=00:00:11, xdelay=00:00:11, mailer=smtp, pri=31907, relay=mail.
gmx.net. [212.227.17.168], dsn=2.0.0, stat=Sent (Requested mail action okay, completed: id=1M2f9b-1omw4Q0cIR-004AjY)
-----------------

And two:
I don't use any hidden sender address: see mail log above: my real
email address, plus the legit "relay=mail.gmx.net" being used for mail
transfer.

The only thing I could think of is that in RAM - and only there - some
wrong settings are stored, that I changed one or two weeks ago, and
that I restored later on to current and correct settings: But again:
see results above in the sendmail log: seems all fine: correct email
address and mail relays seem being used.

But again: who is the complaining y.antoniowatson@xxxxxxxxx - I don't
even remember this address, nor does it show up in my mail logs .. :)

Wolfgang
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