A few days ago I tried sending a message to someone at kpijci.com. I was just notified that try as it might, my MTA (postfix) could not connect with their MTA. But, I can ping that domain: ping kpijci.com PING kpijci.com (208.109.235.102) 56(84) bytes of data. 64 bytes from 102.235.109.208.host.secureserver.net (208.109.235.102): icmp_seq=1 ttl=46 time=65.3 ms etc.
The diagnostics sent with the bounce are here: Diagnostic information for administrators: Generating server: SA2PR16MB4075.namprd16.prod.outlook.com Receiving server: SA2PR16MB4075.namprd16.prod.outlook.com <name>@kpijci.com 11/6/2025 6:02:22 PM - Server at SA2PR16MB4075.namprd16.prod.outlook.com returned '550 5.4.317 Message expired, cannot connect to remote server(Failed to connect. Winsock error code: 995, Win32 error code: 995)' 11/6/2025 5:52:29 PM - Server at webmail.astecindustries.com (184.174.187.70) returned '450 4.4.317 Cannot establish session with remote server [Message=Failed to connect. Winsock error code: 995, Win32 error code: 995] [LastAttemptedServerName=webmail.astecindustries.com] [LastAttemptedIP=184.174.187.70:25] [SmtpSecurity=-2;-2] [BL3PEPF0000020B.namprd08.prod.outlook.com 2025-11-06T17:52:39.254Z 08DE190B72536A37](Failed to connect. Winsock error code: 995, Win32 error code: 995)' Does this mean what I thing it does? That the company is running Win32 on it's mail server? WTF? TIA, Rich
