At the request of the customer-base, traffic that is classified as sufficiently spammy (by various "Black Box" algorithms that I have no knowledge of the inner workings...) is deleted even after a successful delivery.
At one point, Hotmail tried to turn off the delete action for sufficiently spammy, and just delivered it into Junk; Customers complained. Loudly. So whether the system is correctly classifying your traffic or not, I cannot say. But the behavior is not unexpected in certain scenarios. Which one of them applies to you, I cannot say. Even if I wanted to! But I really have no idea, and no way to find out. This "Delete" action is a well-known mitigation that is not unique to Hotmail. About the only way around it would be to login to your test account, and safe sender the sending email address. Among other things, that will force the system to reconsider the verdict that it has assigned to the IP and the traffic coming from it. It's possible that the IPs have a left-over bad reputation from a previous sender, but that's difficult to tell. Good luck. Aloha, Michael. -- Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has Been Processed." | Got the Junk Mail Reporting Tool ? -----Original Message----- From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Andreas Ziegler Sent: Wednesday, June 8, 2016 6:50 PM To: mailop@mailop.org Subject: [mailop] Microsoft/Hotmail discards mails Hi, a user of my server complained, that some of his mails don't reach mail accounts from hotmail/live/outlook etc. that complaint is nothing new, the problem exists for months now. the users mails are dkim signed, the domain has DKIM and SPF TXT DNS records, since yesterday there is also a DMARC record. i investigated further, set up test accounts on both ends and indeed, they are accepting the mail with 250 but it doesn't appear in the inbox or even junk folder. According to SNDS, the IP has "normal status" and no events are logged. i reached out to them through their form two times and got the same answer twice, that the IP doesn't qualify for mitigation. the thing is, i can't figure out a) why they discard the mails b) why they don't reject them, that would be much better we're a low volume sender, so i investigated the logs manually and can't find any outgoing spam. all of the users recipients do really want to get these mails and are very upset that they don't receive them. and even if they didn't want to, they could tell via mail or even in person, as all of them are at the same university (and are friends). perhaps someone has an additional idea, another form or contact address or what can i try to solve this? ticket numbers: SRX1342522740ID / SRX1342663522ID. Regards Andreas _______________________________________________ mailop mailing list mailop@mailop.org https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fchilli.nosignal.org%2fcgi-bin%2fmailman%2flistinfo%2fmailop&data=01%7c01%7cmichael.wise%40microsoft.com%7cb2c91735275742b7b2e408d390093f5c%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=ccB7YaSdDu3ZN4SrE8MCC6JwpavpsqE9aJz6InPWXPM%3d _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
