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Re: Re: SPF is not usable as legal measure against spammers.

2004-07-20 13:34:42
Nico Kadel-Garcia wrote:

Sorry, I have repeatedly explained elsewhere that the PTR records cannot be
relied on to match the A record. It's a common and recommended practice to
do so, but it's hardly mandatory nor should it be.



It should not be mandatory for a PTR record to match "the" A record. But any reliable publisher of PTR records should publish at least an A record that matches it, even if it's not "the" A record.

By which I mean this:

If you have:
4.3.2.1.in-addr.arpa.   IN   PTR      4-3-2-1.dynamic.example.com.

...then it's OK if you or anyone else publishes
blah.example.com   IN   A   1.2.3.4

...but it absolutely should be required for you to publish
4-3-2-1.dynamic.example.com. IN A 1.2.3.4
...as well.

as well.


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