Hello, I have two servers running on Postfix, one of which runs version 2.10.1 and the other server runs version 3.4.7.
On the server where I am running verion 3.4.7, I receive "501 5.5.4 Invalid domain name" errors in emails sent to different servers. Rhe mail is sent to postfix through exim from a relay connection. The reverse of the IP is configured correctly and the From domain is also responding. # Log example postfix-out/smtp[12931]: E30639204ED: to=<m_snyder...@hotmail.com>, relay= hotmail-com.olc.protection.outlook.com[104.47.124.33]:25, delay=1.4, delays=0.08/0/1.4/0, dsn=5.5.4, status=bounced (host hotmail-com.olc.protection.outlook.com[104.47.124.33] refused to talk to me: 501 5.5.4 Invalid domain name [ HK2APC01FT037.eop-APC01.prod.protection.outlook.com]) The only difference that I see in the logs of version 2 and version 3, is the following # Postfix 2 postfix/smtpd[2377]: 539628047FD1: client=servername[179.x.x.x] # Postfix 3 postfix-out/smtpd[9433]: 7F6809204ED: client=localhost[127.0.0.1] Any ideas? Regards, Any ideas?
