If you would a little help please w/my Bind to impliment SPF:
In a zone file I would add: example.com. IN TXT "v=spf1 mx ptr ip4:63.170.56.4 -all" mail.example.com. IN TXT "v=spf1 a -all" mail2.example.com. IN TXT "v=spf1 a -all"
Is this correct - one line for the domain and one line for each mailserver?
Yes, that looks good to me. :)
With those, mail coming from "[EMAIL PROTECTED]" or "[EMAIL PROTECTED]" will fail unless they come from the IP of mail.example.com or mail1.example.com. Mail coming from "[EMAIL PROTECTED]" could come from any IP in the MX record of example.com, any IP with a reverse DNS at .example.com, or the IP 63.170.56.4.
-Scott
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