Sorry for the confusion but "protection.outlook.com" refers to O365 inbound, which is mail directed to Office365 business subscribers, not the consumer side of the house (outlook.com/hotmail/msn/live/ note that custom domains exist in outlook.com consumer business too)
The enterprise side sees vastly different traffic in all buckets (good, bulk, spam) and IP reputation is maintained separate for now, and remediation tools/processes. To delist from O365 a simple portal here: https://docs.microsoft.com/en-us/office365/securitycompliance/use-the-delist-portal-to-remove-yourself-from-the-office-365-blocked-senders-lis <http://www.expta.com/2017/01/how-to-confirm-if-your-ip-address-is.html> To escalate O365 deliverability issues, Office365 support tickets must be opened. I recognize modernizing sender support tools across consumer and enterprise is well overdue, but not the simplest thing to do or easy to prioritize. Thanks, Mihai From: Howard F. Cunningham Sent: Wednesday, July 18, 2018 11:23 AM To: mailop@mailop.org Subject: Office 3654 NDR: : 451 4.7.500 Server busy. Please try again later from Hi I moved a mailman server that has been hosting a private list for 10 years from one data center to a new datacenter over the weekend. After getting a PTR record setup, I was then able to get mailman's IP address delisted at Microsoft. Now, any emails from mailman, about 30 users, to Office 365, the following NDR is returned: Jul 18 10:32:00 macrh01 postfix/smtp[29165]: B40B24092C: to=<br...@xxxxxxxx.com<mailto:br...@xxxxxxxx.com>>, relay=xxxxxx-com.mail.protection.outlook.com[207.46.163.10]:25, delay=76, delays=0.07/72/2.8/0.95, dsn=4.7.500, status=deferred (host xxxxx-com.mail.protection.outlook.com[207.46.163.10] said: 451 4.7.500 Server busy. Please try again later from [38.127.207.153]. (AS77713200) [DM3NAM03FT040.eop-NAM03.prod.protection.outlook.com] (in reply to end of DATA command)) Any suggestions as to where/how I go to clear this? hc Howard Cunningham, MCP Microsoft Small Business Specialist Macro Systems, LLC 3867 Plaza Drive Fairfax, VA 22030 www.macrollc.com<http://www.macrollc.com/> 703-359-9211 howa...@macrollc.com<mailto:howa...@macrollc.com> - personal For technical support, send an email to serv...@macrollc.com<mailto:serv...@macrollc.com> or call 703-359-9211 (24/7) -- ExchangeDefender Message Security: Click below to verify authenticity https://verify.exchangedefender.com/verify.php?id=w6J0493R007074&from=howa...@macrollc.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://chilli.nosignal.org/cgi-bin/mailman/private/mailop/attachments/20180719/9766b261/attachment-0001.html> ------------------------------ Message: 2 Date: Thu, 19 Jul 2018 00:58:18 +0000 From: lists <li...@snowpondtech.com> To: "Howard F. Cunningham" <howa...@macrollc.com>, "mailop@mailop.org" <mailop@mailop.org> Subject: Re: [mailop] FW: Office 3654 NDR: : 451 4.7.500 Server busy. Please try again later from Message-ID: <dm6pr11mb256987191f00ec40e1e29d14ce...@dm6pr11mb2569.namprd11.prod.outlook.com> Content-Type: text/plain; charset="windows-1252" https://sendersupport.olc.protection.outlook.com/pm/ Outlook.com Postmaster<https://sendersupport.olc.protection.outlook.com/pm/> sendersupport.olc.protection.outlook.com Outlook.com Postmaster provides information for the administrators of systems sending email to Outlook.com. Regards, Joshua Zukerman Snow Pond Technology Group Inc. Office 207-692-2415
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