Hi List
In the last couple of days, our outbound IP addresses keep getting
blocked by Microsoft.
Last on 12. October with Message:
550 5.7.1 Unfortunately, messages from [157.161.12.69] weren't sent. Please
contact your Internet service provider since part of their network is on our
block list (S3150). You can also refer your provider to
http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11B9D54E88BF532F]
I double checked with the statistics from the SNDS Service. The IP did
not show up in this list on 12. October or the day before.
Some ip addresses on the same /24 (many are used for our email
services within that /24) were in the yellow state, but never in the red
state.
We still get about 90% false positives from Microsoft customers using
the Junk folder as Trash, inadvertently reporting all those emails they
receive from our customers as spam to us. But that seems to be a German
language problem which I attempted to address many times with Microsoft
without any success yet.
The IP addresses found in the red state are in completely different
networks in our AS and belong to most probably trojanized customers.
On
https://sendersupport.olc.protection.outlook.com/pm/troubleshooting#errors
I can't find any mention of S3150 or PFA.
Google Research shows S3150 being related to rate limiting and
Microsoft Support asking the Sending ISP to contact Microsoft (which
when I contact them, I get told that the 'paying' Microsoft Customer has
to contact them, not the ISP)
Has anyone a clue, what might be the cause and how to resolve?
Mit freundlichen Grüssen
-Benoît Panizzon-
--
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 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
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