Hi, In case it helps, we're also experiencing similar issues. Some of our IPs were affected on Sep 26, and almost all IPs were affected last Friday (Oct 04).
We also don't have any red IPs in SNDS. Even high-volume IPs with hundreds of consecutive green days and no spam trap hits were affected. It may be related to rate limiting, but it seems that some of our IPs were limited to 0 messages/day, as they kept receiving the same message for several days without being able to deliver a single message. Cloudflare's email routing service also seems to be affected. There are several topics in their community where users are actively reporting issues. Example: https://community.cloudflare.com/t/outlook-blocked-cloudflare-email-routing-ips/714617 I tried to open a ticket for all IPs at once, as well as by IP ranges, but had better luck opening a ticket for each IP. I had to use ChatGPT to handle the high number of tickets, but so far ~250 IPs have been unblocked. Regards, Fernando On Mon, Oct 7, 2024 at 7:00 PM Sridhar Kakkillaya via mailop < mailop@mailop.org> wrote: > Hi Michael, > > Thank you for the response. The pointer on rate limiting is useful. > > Regards, > > -- > > Sridhar Kakkillaya > > VP Operations, MailChannels > <https://www.mailchannels.com/?utm_source=Email%20Signature&utm_medium=Sridhar%20Kakkillaya&utm_campaign=Website> > > > Facebook <http://bit.ly/2dnoP3K> | Twitter <http://bit.ly/2ehoWni> | > LinkedIn <http://bit.ly/2dw87lU> | Help Center > <https://mailchannels.zendesk.com/hc/en-us?utm_source=Email%20Signature&utm_medium=Sridhar%20Kakkillaya&utm_campaign=Help%20Center> > > > On Mon, Oct 7, 2024 at 2:06 PM Michael Wise via mailop <mailop@mailop.org> > wrote: > >> >> >> I no longer have any responsibilities for the Consumer (Hotmail, Outlook) >> side of the house, and even if I did, you have done all we allow in opening >> a ticket. >> >> But as the message states, this is a rate-limiting issue; too much >> traffic in too small a window of time. >> >> >> >> 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:* mailop <mailop-boun...@mailop.org> *On Behalf Of *Sridhar >> Kakkillaya via mailop >> *Sent:* Monday, October 7, 2024 10:24 AM >> *To:* mailop <mailop@mailop.org> >> *Subject:* [EXTERNAL] [mailop] Email Delivery to Microsoft >> >> >> >> Hi All, >> >> >> >> Since yesterday, we have been having issues delivering emails to >> Microsoft destinations (Hotmail/Outlook). We deliver emails from several IP >> addresses, and we are being temp-failed across many of them with the >> following error message: >> >> >> >> 4.7.650 The mail server [<IP address>] has been temporarily rate limited >> due to IP reputation. For e-mail delivery information, see >> https://postmaster.live.com (S775) [Name=Protocol Filter Agent >> ][AGT=PFA][MxId=11B9A386454EAA89] >> >> >> >> We monitor all of our IP's on SNDS. They are all Green or Yellow. None in >> Red. >> >> >> >> We have also opened up a ticket with Microsoft but haven't heard back >> yet. >> >> >> >> Does anyone have any pointers on what we should do? Is there anyone from >> Microsoft here that would be able to help us figure this out? >> >> >> >> Thanks. >> >> >> Regards, >> >> >> >> -- >> >> *Sridhar Kakkillaya* >> >> VP Operations, MailChannels >> <https://www.mailchannels.com/?utm_source=Email%20Signature&utm_medium=Sridhar%20Kakkillaya&utm_campaign=Website> >> >> >> >> Facebook <http://bit.ly/2dnoP3K> | Twitter <http://bit.ly/2ehoWni> | >> LinkedIn <http://bit.ly/2dw87lU> | Help Center >> <https://mailchannels.zendesk.com/hc/en-us?utm_source=Email%20Signature&utm_medium=Sridhar%20Kakkillaya&utm_campaign=Help%20Center> >> _______________________________________________ >> mailop mailing list >> mailop@mailop.org >> https://list.mailop.org/listinfo/mailop >> > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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