tickets #115238: Mail bounces on mail list - openSUSE admin - openSUSE Project Management Tool

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#1

Updated by pjessen over 1 year ago

Private changed from Yes to No

robin_listas wrote:

Diagnostic information for administrators:
Generating server: AS8P251MB0957.EURP251.PROD.OUTLOOK.COM

For starters, that seems odd - why should Microsoft Office365 be involved in a delivery from an openSUSE list to a googlemail address?

amdlnx60@googlemail.com
Remote Server returned :
550-5.7.26 The MAIL FROM domain [telefonica.net] has an SPF record with a hard
550-5.7.26 fail policy (-all) but it fails to pass SPF checks with the ip:
550-5.7.26 [104.47.12.57]. To best protect our users from spam and phishing,
550-5.7.26 the message has been blocked. Please visit
550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more
550 5.7.26 information. bc22-20020a056402205600b0043cfd7f7afdsi11372238edb.508 - gsmtp'

So somehow Microsoft tried to deliver something to "amdlnx60@googlemail.com", but google rejected it.
Assuming "MAIL FROM" is the "MAIL FROM" used in the SMTP transaction, iow the envelope address, that also seems odd. When we deliver
mail from lists, we use the list bounce address as envelope.

104.47.12.57 = mail-db3eur04lp2057.outbound.protection.outlook.com
104.47.18.111 = mail-am6eur05lp2111.outbound.protection.outlook.com

I have to assume this is someone with Office365 hosting having their mails forwarded to "amdlnx60@googlemail.com". I do not understand why Office365 should be sending anything with "MAIL FROM: something@telefonica.net".

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#2

Updated by pjessen over 1 year ago

Category set to Email
Status changed from New to Feedback
Assignee set to pjessen

Is there anything in the NDR / bounce message that tells you which mail is being rejected? a message-id would be helpful. The timestamps might also help. I see that we send quite a few mails to 'amdlnx60' every day, e.g. from factory.lists.

FWIW, In April 2022, Felix reported something similar.

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#3

Updated by robin_listas over 1 year ago

File p p added

I have several bounces, 7 at least with header "Undeliverable: ".
Why MS Office365 involved, why not bouncing to the envelope address? Trust MS to do things wrong.

Messagges ID of posts which they bounced:

Message-ID: afc792db-5117-1022-5ef8-c9bd27128d63@telefonica.net
From: "Carlos E. R." robin.listas@telefonica.net
In-Reply-To: 49a6df81-b4e0-150f-2be0-feb109c4a347@j4computers.com
Date: Wed, 10 Aug 2022 17:36:56 +0200
To: oS-EN users@lists.opensuse.org

Message-ID: d3966aa4-0b65-3de6-79f1-51417930f509@telefonica.net
Date: Thu, 11 Aug 2022 12:27:13 +0200
Subject: Re: logrotate, systemd, stopped rotating a log
To: oS-EN users@lists.opensuse.org
References: 00d5eac4-95ec-d8e2-d689-b354eb940c5a@j4computers.com
20220810231721.GP22216@wahoo.no-ip.org
From: "Carlos E. R." robin.listas@telefonica.net
In-Reply-To:

Message-ID: d3966aa4-0b65-3de6-79f1-51417930f509@telefonica.net
Date: Thu, 11 Aug 2022 12:27:13 +0200
Subject: Re: logrotate, systemd, stopped rotating a log
To: oS-EN users@lists.opensuse.org
References: 00d5eac4-95ec-d8e2-d689-b354eb940c5a@j4computers.com
20220810231721.GP22216@wahoo.no-ip.org
From: "Carlos E. R." robin.listas@telefonica.net

(yes, two bounces for a single message)

Message-ID: 95334ac4-4c78-28a9-311a-cc203a7e2900@telefonica.net
Date: Thu, 11 Aug 2022 12:17:57 +0200
Subject: Re: [oS-en] Recovering dead text file
To: oS-EN users@lists.opensuse.org
References: ed884162-3bf4-e460-b681-09b082a2b43d@telefonica.net
fccd63b9-1861-d86b-6cec-860da14e395b@suddenlinkmail.com
From: "Carlos E. R." robin.listas@telefonica.net

Message-ID: 95334ac4-4c78-28a9-311a-cc203a7e2900@telefonica.net
Date: Thu, 11 Aug 2022 12:17:57 +0200
Subject: Re: [oS-en] Recovering dead text file
To: oS-EN users@lists.opensuse.org
References: ed884162-3bf4-e460-b681-09b082a2b43d@telefonica.net
fccd63b9-1861-d86b-6cec-860da14e395b@suddenlinkmail.com
From: "Carlos E. R." robin.listas@telefonica.net
In-Reply-To: fccd63b9-1861-d86b-6cec-860da14e395b@suddenlinkmail.com

Message-ID: 9b08171d-9ff2-3410-bb52-f4319b607984@telefonica.net
Date: Thu, 11 Aug 2022 13:37:54 +0200
Subject: Re: [oS-en] Recovering dead text file
To: oS-EN users@lists.opensuse.org
References: ed884162-3bf4-e460-b681-09b082a2b43d@telefonica.net
fccd63b9-1861-d86b-6cec-860da14e395b@suddenlinkmail.com
95334ac4-4c78-28a9-311a-cc203a7e2900@telefonica.net
20220811112640.yothu2esdyy264nx@grusum.dhaller.de
From: "Carlos E. R." robin.listas@telefonica.net
In-Reply-To: 20220811112640.yothu2esdyy264nx@grusum.dhaller.de

(again, a double bounce)

I just replied to a post, and got two new bounces:

Message-ID: 1f489760-24d5-2d3d-d1a2-9774c79d1973@telefonica.net
Date: Thu, 11 Aug 2022 18:28:21 +0200
Subject: Re: [oS-en] Recovering dead text file
To: oS-EN users@lists.opensuse.org
References: ed884162-3bf4-e460-b681-09b082a2b43d@telefonica.net
fccd63b9-1861-d86b-6cec-860da14e395b@suddenlinkmail.com
95334ac4-4c78-28a9-311a-cc203a7e2900@telefonica.net
20220811112640.yothu2esdyy264nx@grusum.dhaller.de
9b08171d-9ff2-3410-bb52-f4319b607984@telefonica.net
20220811132813.GQ22216@wahoo.no-ip.org
869e3a38-04e0-7840-f2ae-c771f84aab9a@dodin.org
From: "Carlos E. R." robin.listas@telefonica.net
In-Reply-To: 869e3a38-04e0-7840-f2ae-c771f84aab9a@dodin.org

I can try to attach the full bounce message as file here.

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#4

Updated by pjessen over 1 year ago

robin_listas wrote:

I have several bounces, 7 at least with header "Undeliverable: ".
Why MS Office365 involved, why not bouncing to the envelope address? Trust MS to do things wrong.

Yes, but there is no reason for MS to be in the loop.

Messagges ID of posts which they bounced:
Message-ID: afc792db-5117-1022-5ef8-c9bd27128d63@telefonica.net

Remarkably, except for one, all copies were sent to Microsoft Office365 :-)

Well, my guess is that some subscriber whose mail account is hosted by Microsoft O365 has his mail forwarded to "amdlnx60@googlemail". I cannot fathom why MS would deliver such a forwarding with MAIL FROM: you@telefonica.net, that seems nonsensical.
I have no way of knowing which subscriber it is.

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#5

Updated by robin_listas over 1 year ago

Possibly:

Resent-From: gregormeier@outlook.com

you can see that in the attached "p" file.

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#6

Updated by pjessen over 1 year ago

robin_listas wrote:

Possibly:

Resent-From: gregormeier@outlook.com

you can see that in the attached "p" file.

Hmm, the attachment didn't make it through, but that address is not in the logs from today.

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#7

Updated by robin_listas over 1 year ago

File is here: https://progress.opensuse.org/attachments/download/13649/p
It was not mailed, but uploaded to the ticket server.

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#8

Updated by pjessen over 1 year ago

robin_listas wrote:

File is here: https://progress.opensuse.org/attachments/download/13649/p
It was not mailed, but uploaded to the ticket server.

Ah, yes. Well, it is still not 100% clear, but gregormeier@outlook.com does seem to be involved. Looking in our mail logs (on anna) for all of August, we have however not sent a single email to that address.

I'm not sure if there is anything we can do or need to do - judging by the bounce text (550-5.7.26) it appears to be Microsoft trying to deliver a mail to Google (amdlnx60), using MAIL FROM: you@telefonica. Most places with SPF checks would (and should) reject that. It is however more likely that Google is looking at the header address From:, and rejecting based on that.

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#9