spf
http://www.openspf.org/SPF_Record_Syntax
Here is some SPF examples
v=spf1 include:_spf.google.com a a:server10.hosthat.com ip4:147.243.1.48 -all
DMARC record
_dmarc.yourdomain.com TXT "v=DMARC1; p=none"
If you need to reject email, add
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]
If you just need report, add
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected];
[email protected] – this can be any email address where you need DMARC reports sent to. Mail providers sent you report on this, that you can review to make sure no one sending spam mails.
SPF Tools
http://www.kitterman.com/spf/validate.html
http://spf.myisp.ch