Hey, I have a great idea. Why don't we try to drive away the only Microsoft person who ever bothers to post anything to this list?
On Fri, Feb 20, 2026 at 4:39 PM Michael Denney via mailop <[email protected]> wrote: > So you're of zero help, thank you for wasting everyone's time. > > Thank you, > > Michael Denney > MDDHosting LLC > http://www.mddhosting.com/ > > On Feb 20, 2026, at 6:50 PM, Michael Wise <[email protected]> > wrote: > > > As I hinted previously, no. > I no longer can comment on the Consumer side of the house. > > Aloha, > Michael. > -- > *Michael J Wise* > Microsoft Corporation| Spam Analysis > "Your Spam Specimen Has Been Processed." > Open a ticket for Hotmail <http://go.microsoft.com/fwlink/?LinkID=614866> > ? > > *From:* Michael Denney <[email protected]> > *Sent:* Friday, February 20, 2026 3:49 PM > *To:* Michael Wise <[email protected]> > *Cc:* Matthew Pounsett <[email protected]>; [email protected] > *Subject:* Re: [mailop] [EXTERNAL] Anyone from Outlook? S3150 block list > mirage > > You don't often get email from [email protected]. Learn why this is > important <https://aka.ms/LearnAboutSenderIdentification> > I checked mail logs going back to December 2025 - and I see exactly *zero* 421 > errors. As a matter of fact we have *exactly zero *4XX responses from > Outlook - network wide, but I do see 550's with the error 3150. > > Are you *sure* this is properly implemented? > > Feels half-baked as though it was AI vibe coded. > > Thank you, > > Michael Denney > MDDHosting LLC > http://www.mddhosting.com/ > > > On Feb 20, 2026, at 6:29 PM, Michael Wise <[email protected]> > wrote: > > > … slower. > > Aloha, > Michael. > -- > *Michael J Wise* > Microsoft Corporation| Spam Analysis > "Your Spam Specimen Has Been Processed." > Open a ticket for Hotmail <http://go.microsoft.com/fwlink/?LinkID=614866> > ? > > *From:* Michael Denney <[email protected]> > *Sent:* Friday, February 20, 2026 3:27 PM > *To:* Michael Wise <[email protected]> > *Cc:* Matthew Pounsett <[email protected]>; [email protected] > *Subject:* Re: [mailop] [EXTERNAL] Anyone from Outlook? S3150 block list > mirage > > You don't often get email from [email protected]. Learn why this is > important <https://aka.ms/LearnAboutSenderIdentification> > We’ve also been seeing this. Clients that have dedicated mailing IPs that > haven’t had issues and have been established for a long time. No new > increased flows - normal transactional emails. > > Even opened a ticket and got told everything was fine. > > If it’s throttling - why not just say that? > > So what do we tell customers? “Microsoft things you’re sending too much > mail and there’s nothing you can do but send less mail.”? > > Thank you, > > Michael Denney > MDDHosting LLC > https://www.mddhosting.com/ > > > > On Feb 20, 2026, at 6:11 PM, Michael Wise via mailop <[email protected]> > wrote: > > > > It’s IP specific, and is dynamically assigned. > > Aloha, > Michael. > -- > *Michael J Wise* > Microsoft Corporation| Spam Analysis > "Your Spam Specimen Has Been Processed." > Open a ticket for Hotmail <http://go.microsoft.com/fwlink/?LinkID=614866> > ? > > *From:* Matthew Pounsett <[email protected]> > *Sent:* Friday, February 20, 2026 2:50 PM > *To:* Michael Wise <[email protected]> > *Cc:* [email protected] > *Subject:* Re: [EXTERNAL] [mailop] Anyone from Outlook? S3150 block list > mirage > > > > On Fri, Feb 20, 2026 at 5:01 PM Michael Wise <[email protected]> > wrote: > > It’s throttling. > Slow down your deliveries. > > > The rate limit must be incredibly low, if that's the case. We sent less > than 1500 messages to outlook.com mail servers all day on February 20th. > > If it is a rate limit, then please share where the rate limit is > documented, so that I can set the throttle appropriately. I can't keep > under a rate limit if I don't know what it is. > > And if it's a rate limit, why are we getting 500 errors instead of 400? > That should be a temporary error. > > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop > > > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop > -- =============================================== Russell Clemings <[email protected]> ===============================================
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