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>, 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=w6IFMaX1028244&from=howa...@macrollc.com
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