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Re: [spf-discuss] Re: libspf2 sample programs

2007-01-04 19:46:16
On Thu, Jan 04, 2007 at 04:42:11PM -0800, 
Dan_Mitton(_at_)Notes(_dot_)YMP(_dot_)GOV wrote:
Yes, I agree.  But if the HELO is something like:

HELO xyzzy

doesn't SPF return 'unknown'?  There is nothing for it to lookup.  So this 
would "pass" the HELO test (and hopefully fail somewhere down the line).

Why would you even try SPF here?

Such a parameter is invalid per RFC 1123, and can be rejected.

RFC 1123 section 5.2.5:
" Note also that the HELO argument is still required to have
  valid <domain> syntax, since it will appear in a Received:
  line; otherwise, a 501 error is to be sent.
"

"xyzzy" is _not_ a valid domain syntax -> 501 error


Alex

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