I know others have earlier yesterday and today reported DNS and SSL issues with Microsoft, but we are now seeing lots of errors in our Zimbra MTA logs like:
<domain>-com.mail.protection.outlook.com[52.101.8.36] said: 451 4.3.2 Temporary server error. Please try again later ATTR2 [DS3PEPF000099D5.namprd04.prod.outlook.com 2026-01-22T20:45:56.009Z 08DE596FAC061748] (in reply to MAIL FROM command)) As well as errors like: (Host or domain name not found. Name service error for name=<domain>-com.mail.protection.outlook.com type=A: Host not found, try again) If I do a DNS lookup from my own workstation, I get: mstone@lms-macbookpro ~ % host <domain>-com.mail.protection.outlook.com <domain>-com.mail.protection.outlook.com has address 52.101.41.58 <domain>-com.mail.protection.outlook.com has address 52.101.194.15 <domain>-com.mail.protection.outlook.com has address 52.101.8.34 <domain>-com.mail.protection.outlook.com has address 52.101.42.16 Host <domain>-com.mail.protection.outlook.com not found: 2(SERVFAIL) Host <domain>-com.mail.protection.outlook.com not found: 2(SERVFAIL) Regards, Mark -- _________________________________________________________________ L. Mark Stone, Founder North America's Leading Zimbra VAR/BSP/Training Partner For Companies With Mission-Critical Email Needs Winner of the Zimbra Americas VAR Partner of the Year - Two Years Running ! _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
