[Cialug] RFC & best practices for mail server hostnames?

[Dave Weis]

> Actually, those are valid *inbound* email servers, .. outbound servers technically do not need to be listed; it would be
 > *nice* if they were required, but I have never seen that implemented.


But they are:

[djweis at charmed ~]$ nslookup -type=txt statefarm.com
Server:         67.224.64.31
Address:        67.224.64.31#53

Non-authoritative answer:
statefarm.com   text = "v=spf1 ip4:12.34.246.0/24 ip4:204.94.39.0/24 ip4:204.118.102.0/24 ip4:205.166.218.0/24 ip4:205.242.228.0/23 ~all"