I have no idea, and try not to make public facing statements, sorry. Aloha, Michael. — “Your Spam Specimen Has Been Processed,” ________________________________ From: mailop <mailop-boun...@mailop.org> on behalf of Johann Klasek via mailop <mailop@mailop.org> Sent: Wednesday, October 11, 2023 11:50:16 AM To: Michael Wise via mailop <mailop@mailop.org> Subject: Re: [mailop] [EXTERNAL] outlook.com 421 try again later S77719
Hi Michael! On Wed, Oct 11, 2023 at 06:07:13PM +0000, Michael Wise via mailop wrote: > > That's volume throttling, not IP blocking. > Did you recently bring a new block online, or ... someone sending out an > abnormally large volume of mail? > If it's going out thru shared IPs, that could also be part of the problem, > but this is just speculation. What about Deferred: 451 4.7.500 Server busy. Please try again later from [x.x.x.x]. (S77719) [VI1EUR05FT) This suddently occured from 11 or 12 o'clock (+0200) until around 19 o'clock (+0200). The backlogs in our queues are now gone. On our site we could rule out any increase in traffice or "new" ip addresses. A lot of our customer blamed us for not delivering e-mail properly and they are surly eager to know what happend to the "hosting provider" of their communication partners. Is there any (more less official) statement regarding this? Maybe you have an explanation for us ... Thanks a lot in advance. Johann _______________________________________________ mailop mailing list mailop@mailop.org https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist.mailop.org%2Flistinfo%2Fmailop&data=05%7C01%7Cmichael.wise%40microsoft.com%7C9adc2bd23ba14343613808dbca8cfe4b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C638326479157826411%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ZWwGrDHBHVvv3%2FwdYqX%2BmQ5F7vf24o4xgUpQ5T48iX4%3D&reserved=0<https://list.mailop.org/listinfo/mailop>
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