Do you have to have an IP in the SPF or can you just use the domain

Question

I'm trying to see if there is a better way to have my SPF records using the domain opposed to using the ip address - so if the IP does happen to change - the zones don't need to be updated.

"v=spf1 +a +mx +ip4:216.38.16.18 ?all"

BECOMES

"v=spf1 a:example.com mx:example.com ?all"

Assuming I've written the SPF rule correctly.

Answer 1

Yes you can have both IP and FQDN. See link for more details:

http://www.openspf.org/RFC_4408#examples

Hope this helps