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

Dave Weis djweis at internetsolver.com
Fri Feb 1 12:55:57 CST 2013



> 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"




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