+1
I emailed mailop list about a similar issue and a Microsoft admin
emailed me privately about it. My listing in their system was caused by
a hacked account that was resolved in a few hours, but they continued
treating us as a spam source for several days after. The MSFT guy
eventually told me that there was an internal issue that prevented my
auto delisting and they fixed it.
Also, as a mitigation step I sent outgoing through a different IP
address for awhile. I keep a /26 in my SPF record so I just picked
another one from that block. I don't know if you have that luxury.
On 12/8/2020 10:50 AM, Mike Hammett wrote:
MailOps would be better suited than NANOG.
-----
Mike Hammett
Intelligent Computing Solutions <http://www.ics-il.com/>
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
Midwest Internet Exchange <http://www.midwest-ix.com/>
<https://www.facebook.com/mdwestix><https://www.linkedin.com/company/midwest-internet-exchange><https://twitter.com/mdwestix>
The Brothers WISP <http://www.thebrotherswisp.com/>
<https://www.facebook.com/thebrotherswisp>
<https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
------------------------------------------------------------------------
*From: *"Steve Jones" <[email protected]>
*To: *"AnimalFarm Microwave Users Group" <[email protected]>
*Sent: *Tuesday, December 8, 2020 8:57:31 AM
*Subject: *Re: [AFMUG] SMTP Spam troubles
I think the microsoft outage recently forced them to tickle their
middle bits. They rate limited RackSpace even the other day. This is
yet another of the billion reasons why Im glad we dont host our own email
The NANOG list will probably get you contacts for resolutions
On Tue, Dec 8, 2020 at 8:51 AM Nate Burke <[email protected]
<mailto:[email protected]>> wrote:
I've started having a lot of problems over the last week with my
mailserver getting blocked for Spam. I can't find any reason why,
but
Microsoft/Senderbase/Comcast are blocking me. I'm not on any
Blacklists
that I can find, MXToolbox shows it clean on all their blacklist
checks,
and it's not on barracuda's list. My Mailserver traffic is
normal, so I
don't' think I have any compromised accounts.
I can't find anywhere to check/remove the Microsoft blacklist. The
Returned SMTP Messages just has a Link to their general FAQ page
and a
helpful note that says 'We are blocking your email, Contact your
network
administrator for assistance'.
Going directly to Senderbase and looking up My server shows the
server
clean.
I've already told one customer to move their domain off of me, so I
don't have to answer their hourly calls wondering when it will be
fixed,
and I'm getting ready to tell another to leave, since there's nothing
that I can find to fix. But it's always MY fault that someone
else is
not accepting their email. It's never up to the person with the
Hotmail
or Comcast account complaining to their company that they can't
receive
mail from this person.
Did something recently change with some SMTP Protocol or vague DNS
check
that I missed updating that the big companies are blacklisting me now?
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