I also run a subscriber only list. Recently Microsoft blocked all or almost all
of our Microsoft users (live.com, msn.com, outlook.com, hotmail.com, etc.) with
a message similar to
host
hotmail-com.olc.protection.outlook.com[52.101.11.4] said: 550 5.7.1
Unfortunately, messages from [MY IP ADDRESS] weren't sent. Please contact
your Internet service provider since part of their network is on our block
list (S3150).
Dream Host responded to Microsoft with a request to unblock our IP (since its
on no publicly known block lists!) -- but also moved our GNU Mailman list to a
different IP address for us as they have no confidence Microsoft will bother.
Still waiting to see if that is the end of it.
-- Michael
Michael Reeder LCPC
Hygeia Counseling Services : Baltimore, Maryland
410-871-TALK / michael(at)securemail.hygeiacounseling.com
http://www.hygeiacounseling.com - main website.
On 2/12/26 10:05 PM, Jim Dory wrote:
> I run a subscriber only email list with maybe 1400 subscribers (facebook has
> drastically diminished the number of
> subscribers and use). Things were going along swimmingly until recently
> microsoft started blocking our list to their
> email users. At first I was getting bounces with this message:
>
> "...has been temporarily rate limited due to IP reputation"
>
> Then, today I am getting this:
>
> "SMTP error from remote mail server after pipelined MAIL FROM:
> [<[email protected]>](mailto:[email protected])
> "
>
> which I assume means they have blacklisted our IP address.
>
> The type of posts to this email list is limited to trade and community
> announcements only, so nothing that constitutes
> spam. We only get about 4 or 5 messages a day average on the list.
>
> So I've been scrolling around on Microsoft's help/troubleshooting pages and
> am flummoxed. Any advice? The list is hosted
> on a VPS I believe by Hawkhost.
>
> On
> https://sendersupport.olc.protection.outlook.com/snds/JMRP
> , I see the below (not sure how this paste will translate
> on an ascii email) which lists some IP addresses that are not ours. Ours is
> similar (on the 198.252..) but not the
> ..110. subnet. Not sure how smart it is to post IP addresses.
>
> That's about all I have now. Hoping for advice.
>
> Feed users
>
> These users are authorized to view data about some or all IPs in this feed.
> Only users with access to all IPs are feed
> managers.
>
> James DoryPostmaster Man
> User Name Email Address Access Type
>
> IPs Sending Feedback
>
> These IPs are already sending complaints as part of this feed.
>
> Networks Status
> 198.252.110.38 - 198.252.110.38
>
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