Hi, I'm not generally involved in our support issues, but a coworker at my work (Linode) reached out to me about what looks to be a new problem involving hosting customers being blocked by by Microsoft. We have 150-200 new support tickets about this, starting on December 21, 2021. Our support goes back and forth with the customers and tries to help, typically 4 responses, but up to 48, per ticket, and both support and customers are growing increasingly frustrated.
Customers and our support team have been reaching out to del...@messaging.microsoft.com, but are concluding this is non-monitored. Linode doesn't provide any e-mail services for the customers, so all these involve different customer-allocated IPs and different hosting customers. While the ones I'm spot checking, looking at these tickets, have DNS, SPF, and other mechanisms set up appropriately, of course the situation varies. At least some of these customers and/or our support has confirmed their Linode IPs are not listed on any public DNSBLS they can find. Linode has by default blocked all outbound SMTP for all accounts starting November 2019, until customers have met certain criteria. I have not become aware of any recent large or not-promptly addressed spamming problems, nor seen recent mention of spammers from Linode IP space on here or other e-mail hosting related lists since I started here in January, 2020. I saw the December thread on this list from a listmember who is (or was?) Linode hosted, and ran into this MS blocking Linode trouble. Here's an example from one ticket, however I'm more looking for whether there is anything I can do to facilitate improving this overall, then starting trying to intervene about (many!) specific tickets and IPs. I would be happy to help with more details off-list, if so requested. I also could relay suggestions or procedural instructions to our support group. redac...@enlogic.gr: host enlogic-gr.mail.protection.outlook.com[104.47.17.74] said: 550 5.7.511 Access denied, banned sender[172.104.233.127]. To request removal from this list please forward this message to del...@messaging.microsoft.com. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653. AS(1410) [DB8EUR05FT065.eop-eur05.prod.protection.outlook.com] (in reply to RCPT TO command) Mark -- Mark G. Thomas <m...@misty.com>, KC3DRE _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
