I have been fixing some problems with emails between two of my servers. At the time I had /etc/hosts file empty except for localhost.
While sending emails, I got several of errors in maillog like these: Dec 2 22:36:28 freedomforlife smtpd[78001]: cd3e9bc4ab696630 smtp connected address=172.58.46.253 host=<unknown> Dec 2 22:36:28 freedomforlife smtpd[78001]: cd3e9bc4ab696630 smtp failed-command command="" result="550 no rDNS is so 80s" Dec 2 22:36:28 freedomforlife smtpd[78001]: cd3e9bc4ab696630 smtp disconnected reason=quit 172.58.46.253 is an IP for T-mobile. Which I use the WiFi hotspot to use SSH from. This was a previous IP I had used before, not on the session in progress. I found several other T-Mobile addresses being used in maillog that were not current sessions. I don't know what to make of this. I rebooted both servers after emptying /etc/hosts. resolv.conf has: lookup file bind nameserver 8.8.8.8 nameserver 8.8.4.4 on this server. What is going on here? How could this possibly be happening? Chris Bennett
