Hello everyone. Working at an ESP company, I wanted to share a weird occurrence I've noticed over the last few weeks with Hotmail IP blocks. We're subscribed to JMRP and SNDS, so obviously we see which IPs on our network are blocked in SNDS dashboard, but as of lately there are a few issues:
The first issue is that Hotmail started blocking IPs by large ranges - /27 and /26 networks most often, which affects not only the offending IPs but neighbouring ones as well, even in cases where these neighbour IPs are in great standing with nothing but "green" status in SNDS. Second issue is that Hotmail started blocking reserved IPs and full C-level subnets that are rserved for future use, 100% not in use right now, and no email have been going through those IPs in at least several months, in some cases - NEVER at all. Third issue and the most frustrating one - is that their ticket system and support became incredibly dense as of lately. Submitting a ticket for deblocking the IP, providing IPs, "from" domains and bounce error text is no longer enough, apparently. Almost each ticket is now returned with the reply that says "We do not see anything offhand with the IP you have submitted that would be preventing your mail from reaching your recipients." Naturally each ticket now turns into a 4-5 mail chain with me providing screenshots of their own SNDS dashboard, providing bounce responses again and again - only for them to at least admit there is a block in place. This eats so much worktime - I'm actually lagging behind on other work. I can handle the "Not qualified for mitigation" response due to IP actually spamming - we'll handle spammers on our side ruthlessly. What I cannot fathom is blocking "green" IPs, blocking IPs that are not even sending (and have not been sending for months) and needing to prove Hotmail that they have our IPs in block in the first place. If anyone has experienced anything like this while dealing with Hotmail - I would really appreciate your input on what you are seeing when dealing with Hotmail/Live.com/MSN/etc <http://live.com/MSN/etc>. and how you are dealing with all of this. Thank you for your time. Dima Gomonyk Deliverability/Abuse Specialist <http://www.smtp.com/> T: +1 877-705-9362 E: [email protected] <mailto:> W: www.smtp.com <http://www.smtp.com/> <https://www.facebook.com/SMTPCOM/> <https://twitter.com/smtpcom> <https://www.linkedin.com/company/smtp-com>
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