Hi Mark, April 6 data is still missing on SNDS and most of the IPs are still blocked.
But a few hours ago I received these replies for 3 tickets that were created on Apr 10: We have implemented mitigation for your IP (XX.XX.XX.XX) and this process may take 24 - 48 hours to replicate completely throughout our system. I don't know why they reviewed the ticket again after replying that the IPs wouldn't be unblocked. I will wait and check if they will review the other tickets too. I hope that Microsoft starts providing some information about why IPs are suddenly blocked, specially for IPs that have a long term reputation without issues. No need for internal details about their anti-spam system, of course, but just a tiny amount of info would be extremely helpful for senders that want to do the right thing. I just don't know what happened and if I should change something. Was there an issue on our end? Or did they changed something on their end that generated problems? On Sat, Apr 15, 2023 at 7:12 PM Mark Dale <m...@mailmanlists.net> wrote: > > Hi Fernando, > > Did you make any headway this issue? We've been having the same issues > since April 6. > > Regards, > Mark > > On 2023-04-13 15:25, Fernando MM via mailop wrote: > > Hi, > > > > On Apr 06 we detected that 28 IPs were blocked in Outlook.com, all with > the following error: > > > > 550 5.7.1 Unfortunately, messages from [185.103.9.41] 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 < > http://mail.live.com/mail/troubleshooting.aspx#errors>. > > > > > > Although some of the blocked IPs were new, most of them were in use by > the same customers for years without issues. Part of them didn't had a > single spam report or spam trap hit in the last 3-6 months. > > > > After making sure that these servers weren't compromised, I opened > tickets at https://olcsupport.office.com/ <https://olcsupport.office.com/> > and, after escalation, the response was that the IPs didn't qualify for > mitigation at this time or that there were "changes in email sending > volume" ( there weren't, the volume hasn't changed since we have limits for > each IP/customer to avoid these issues ) > > > > Today I noticed that the data on Apr 06 in missing in SNDS. All other > dates are showing up, just Apr 06 is missing. > > > > I was wondering if anyone else experienced similar issues on Apr 06 with > missing data on SNDS or a high number of IPs getting blocked? > > > > Thanks. > > > > _______________________________________________ > > mailop mailing list > > mailop@mailop.org > > https://list.mailop.org/listinfo/mailop > > >
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