Hello! I have an odd deliverability problem. Microsoft is trying (over and over) to send me emails, and they get past connect/disconnect. This has been going on for a few days now, at a rate of once every 5 seconds. I've tested verified that everything about my mail flow is working fine and passes DANE/DNSEC/etc. In the past few days I've received hundreds, if not more, of emails from across the email spectrum, all without any problems.
My first thoughts were that this was some new monitoring by Microsoft of external systems that have recently sent emails to Microsoft (like when the neighbor brings you some cookies, you'll tend to keep a closer eye on their house) I even went so far as to test sending myself an email from a live.com address, it never arrived. Is there someone from Microsoft/Outlook that could look into what your connections below are trying to achieve and then give me a hint of what I might do differently. Thanks! Jun 28 17:49:48 mx1.domainmail.net postfix/postscreen[20270]: CONNECT from [40.107.91.96]:39489 to [10.10.5.25]:25 Jun 28 17:49:54 mx1.domainmail.net postfix/postscreen[20270]: PASS OLD [40.107.91.96]:39489 Jun 28 17:49:54 mx1.domainmail.net postfix/smtpd[21597]: connect from mail-dm3gcc02on2096.outbound.protection.outlook.com[40.107.91.96] Jun 28 17:49:54 mx1.domainmail.net postfix/smtpd[21597]: Trusted TLS connection established from mail-dm3gcc02on2096.outbound.protection.outlook.com[40.107.91.96]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Jun 28 17:49:54 mx1.domainmail.net postfix/smtpd[21597]: disconnect from mail-dm3gcc02on2096.outbound.protection.outlook.com[40.107.91.96] ehlo=1 starttls=1 quit=1 commands=3 Jun 28 17:49:59 mx1.domainmail.net postfix/postscreen[20270]: CONNECT from [40.107.244.134]:4160 to [10.10.5.25]:25 Jun 28 17:50:05 mx1.domainmail.net postfix/postscreen[20270]: PASS NEW [40.107.244.134]:4160 Jun 28 17:50:05 mx1.domainmail.net postfix/smtpd[21630]: connect from mail-mw2nam12on2134.outbound.protection.outlook.com[40.107.244.134] Jun 28 17:50:05 mx1.domainmail.net postfix/smtpd[21630]: Trusted TLS connection established from mail-mw2nam12on2134.outbound.protection.outlook.com[40.107.244.134]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Jun 28 17:50:05 mx1.domainmail.net postfix/smtpd[21630]: disconnect from mail-mw2nam12on2134.outbound.protection.outlook.com[40.107.244.134] ehlo=1 starttls=1 quit=1 commands=3 Jun 28 17:50:05 mx1.domainmail.net postfix/postscreen[20270]: CONNECT from [2a01:111:f403:200a::711]:13313 to [fd10:10:5::25]:25 Jun 28 17:50:11 mx1.domainmail.net postfix/postscreen[20270]: PASS NEW [2a01:111:f403:200a::711]:13313 Jun 28 17:50:11 mx1.domainmail.net postfix/smtpd[21597]: connect from mail-mw2nam12on20711.outbound.protection.outlook.com[2a01:111:f403:200a::711] Jun 28 17:50:12 mx1.domainmail.net postfix/smtpd[21597]: Trusted TLS connection established from mail-mw2nam12on20711.outbound.protection.outlook.com[2a01:111:f403:200a::711]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Jun 28 17:50:12 mx1.domainmail.net postfix/smtpd[21597]: disconnect from mail-mw2nam12on20711.outbound.protection.outlook.com[2a01:111:f403:200a::711] ehlo=1 starttls=1 quit=1 commands=3 -Jim P. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
