Setting SPF records

[thehappyappy]

Does anybody know who I can set up SPR records? I've created a record and it says that I need to

 

Paste this into your zone file:xxxxxxxxx.com. IN TXT "v=spf1 ip4:xxx.xxx.xxx.xx a mx ~all"

and

 

So this should also appear in DNS. You may or may not be in charge of the DNS for these entries; if you are, add them. 

mail. xxxxxxxxx.com. IN TXT "v=spf1 a -all"

I logged into the server as the root users via ssh and typed in /var/named (which my host told me to do) but all it said was

is a directory

I really need to add this because Microsoft is blocking emails from the site even though it's only an opt-in system

 

Thanks