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B. Johannessen writes:
On Wed, 2003-12-03 at 19:36, Meng Weng Wong wrote:
Eric Allman just emailed me his thoughts on the draft-02.9.txt.
He doesn't like the complexity of the a, mx, ptr, etc directives;
he feels that the only directives that should be there are ip4 and ip6.
I for one would have to agree with this. I don't think there's any
way the current proposal will ever be accepted. It's to complex.
If you think the current syntax is the easiest way for domain admins
to express designated senders, create an application that converts
from this syntax to BIND zone file format (and maybe the format of
a few other DNS content servers).
It should be noted that such an app already existed on spf.pobox.com, and
was very easy to use. I have to agree that using a script, or even a
webpage like that, to *generate* simple records usable in the leading DNS
server zonefiles, would be preferred.
I agree, FWIW. The current spec is quite complex, with places
where recursing lookups are required (include, exec, mx, ptr etc.).
On top of the complexity of implementing a client to implement lookups per
the spec, there's also the danger that an unforeseen combination of rules
in an SPF record will result in timeouts or other issues that can cause
runtime problems in an implementing MTA or scanner. So the complexity of
the spec will lead to complexity of code.
It strikes me that a record-generating app, which takes the complex
concepts of "mx", "ptr" etc. and generates simple records, would reduce
this danger.
- --j.
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