[mailop] outlook.com duplicate emails with "MailboxResubmission" in headers?

[Robert L Mathews via mailop]

One of our customers says that every message they've sent in the last
few days to multiple independent people who use outlook.com suddenly got
a second copy redelivered today.

We were able to get a copy of the headers from one of those
redeliveries, and those headers begin with this (rewrapped so they fit
here, but otherwise unedited):

Received: from DM6PR04MB5740.namprd04.prod.outlook.com
  (2603:10b6:a03:217::32)
  by BY5PR04MB6471.namprd04.prod.outlook.com with HTTPS via
  BY3PR04CA0027.NAMPRD04.PROD.OUTLOOK.COM;
  Thu, 14 May 2020 23:10:28 +
Received: from DM6PR04MB5740.namprd04.prod.outlook.com
  (2603:10b6:5:167::29)
  by DM6PR04MB5740.namprd04.prod.outlook.com (2603:10b6:5:167::29) with
  Microsoft SMTP Server (version=TLS1_2,
  cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2979.28;
  Thu, 14 May 2020 23:10:25 +
Received: from DM6PR04MB5740.namprd04.prod.outlook.com
  (2603:10b6:5:174::31)
  by DM6PR04MB5740.namprd04.prod.outlook.com (2603:10b6:5:174::31) with
  MailboxResubmission id 15.20.2979.28;
  Thu, 14 May 2020 23:10:25 +
Received: from DM6NAM11FT020.eop-nam11.prod.protection.outlook.com
  (2603:10b6:5:174:cafe::b0) by DM6PR21CA0021.outlook.office365.com
  (2603:10b6:5:174::31) with Microsoft SMTP Server (version=TLS1_2,
  cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3021.2
  via Frontend Transport;
  Tue, 12 May 2020 20:02:57 +

The headers then go on to have more May 12 dates as expected, showing
our original delivery to outlook.com.

This seems to show that the message was redelivered entirely within
outlook.com after 2 days with an unusual "MailboxResubmission". But I
can't turn up anything related to that in a search.

Have other people seen this?

-- 
Robert L Mathews, Tiger Technologies, http://www.tigertech.net/

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[mailop] Help with an AT issue

[Michael E. Weisel via mailop]

Hi Mailopers, I hope everyone is doing well and staying healthy.  I’m hopefully 
looking for some help from someone at Verizon/OATH/AT with a sporadic AT 
block on our clients IP pool.  We thought we pinpointed the issue (and the team 
at AT unblocked it), but it came back a little less than two weeks later.

Thanks in advance,

Michael

Michael E. Weisel
CTO / Deliverability Lead
Gold Lasso
(301) 990-9857 Corporate
(240) 813-0174 Direct Dial

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Re: [mailop] [EXTERNAL] Anybody seeing a spike of S844 error from Microsoft

[Michael Wise via mailop]

Replied offline.

Aloha,
Michael.
--
Michael J Wise
Microsoft Corporation| Spam Analysis
"Your Spam Specimen Has Been Processed."
Open a ticket for Hotmail ?

From: mailop  On Behalf Of Rauf Guliyev via mailop
Sent: Thursday, May 14, 2020 10:26 AM
To: mailop@mailop.org
Subject: [EXTERNAL] [mailop] Anybody seeing a spike of S844 error from Microsoft

Hello,

We are seeing a spike of S844 errors from Microsoft started on May 12. SNDS 
doesn't show any changes. To add to the puzzle, it is happening  to only one of 
our datacenters / IP network only, the rest is completely normal.

Thanks in advance,
Rauf
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Re: [mailop] AOL / Yahoo de-listing blocked IPs

[Lili Crowley via mailop]

Please contact me off list

Thanks!

On Thu, May 14, 2020 at 2:26 PM Andre Mascak via mailop 
wrote:

> Hello,
>
> We had a compromised account sending spam to Yahoo accounts two months
> back. The account was locked down and updated, and we've been trying to
> get the IP de-listed ever since. Is there anyone that could contact me
> off list for this?
>
> Thank you,
> Andre
>
>
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>
-- 
Lili Crowley
Postmaster
Verizon Media
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[mailop] AOL / Yahoo de-listing blocked IPs

[Andre Mascak via mailop]

Hello,

We had a compromised account sending spam to Yahoo accounts two months
back. The account was locked down and updated, and we've been trying to
get the IP de-listed ever since. Is there anyone that could contact me
off list for this?

Thank you,
Andre


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[mailop] Anybody seeing a spike of S844 error from Microsoft

[Rauf Guliyev via mailop]

Hello,

We are seeing a spike of S844 errors from Microsoft started on May 12. SNDS
doesn't show any changes. To add to the puzzle, it is happening  to only
one of our datacenters / IP network only, the rest is completely normal.

Thanks in advance,
Rauf
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Re: [mailop] outlook.de all emails from a specific sender flagged as spam, triggering false positive feedback loop - no remedy?

[Vladimir Dubrovin via mailop]

Benoît,

I'm just curious - have you received _new_ FBLs for mailboxes of the
students you have called to?


14.05.2020 12:33, Benoît Panizzon via mailop пишет:
> Dear List
>
> A teacher is customer on our email platform and with covid-19
> homeschool, she is sending daily email to her class.
>
> Each and every emails she is sending to a student with an outlook.de
> email address, causes a spam complaint to be sent to our abuse desk.
>
> I asked the teacher multiple times to double-check the email addresses
> of her students. She did. Still incoming daily complaints.
>
> So I called her today and she confirmed she looked at the issue with
> the affected student and they confirmed the email address @outlook.de
> was correct. She asked me to contact her student to confirm this myself.
>
> So I called her student and learned that indeed, the email address was
> correct but that all emails from her teacher were being flagged a spam.
> She could not find any way to flag those emails as not being spam.
>
> I suppose the student by mistake once flagged one email as spam and
> somehow outlook.de now flags all those emails as spam and generates
> feeback loop complaints.
>
> Does anyone know how to stop this?
>

-- 
Vladimir Dubrovin
Technical advisor @ Mail.ru

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[mailop] outlook.de all emails from a specific sender flagged as spam, triggering false positive feedback loop - no remedy?

[Benoît Panizzon via mailop]

Dear List

A teacher is customer on our email platform and with covid-19
homeschool, she is sending daily email to her class.

Each and every emails she is sending to a student with an outlook.de
email address, causes a spam complaint to be sent to our abuse desk.

I asked the teacher multiple times to double-check the email addresses
of her students. She did. Still incoming daily complaints.

So I called her today and she confirmed she looked at the issue with
the affected student and they confirmed the email address @outlook.de
was correct. She asked me to contact her student to confirm this myself.

So I called her student and learned that indeed, the email address was
correct but that all emails from her teacher were being flagged a spam.
She could not find any way to flag those emails as not being spam.

I suppose the student by mistake once flagged one email as spam and
somehow outlook.de now flags all those emails as spam and generates
feeback loop complaints.

Does anyone know how to stop this?

-- 
Mit freundlichen Grüssen

-Benoît Panizzon- @ HomeOffice und normal erreichbar
-- 
I m p r o W a r e   A G-Leiter Commerce Kunden
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Zurlindenstrasse 29 Tel  +41 61 826 93 00
CH-4133 PrattelnFax  +41 61 826 93 01
Schweiz Web  http://www.imp.ch
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