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Julian Mehnle wrote:
As for real implementation behavior, Mail::SPF currently treats
"a:foo..bar" as a simple mismatch.
Wait a moment, I was talking about <target-name> foo..bar, are you
talking about a <directive> a:foo..bar ? Adjacent dots before the
macro expansion step directly written in a policy are a PermError,
aren't they ?
I was talking about <target-name> = "foo..bar", but it's all the same,
really. "a:foo..bar" is not a syntax error. In any case, according to
RFC 4408, a PermError should not be thrown for that reason.
Uhmmmm, it just occurred to me that RFC 4408, 2.5.7[1] makes the following
disturbing statement:
| Be aware that if the domain owner uses macros (Section 8), it is
| possible that this [PermError] result is due to the checked identities
| having an unexpected format.
This implies that "a:%{h}" with HELO = "1.2.3.4" COULD be considered to
justify a PermError result. However, I think we better make an erratum
out of this, since there's probably not a single SPF implementation on
earth that actually performs another syntax check after macro expansion.
Comments?
References:
1. http://www.openspf.org/RFC_4408#op-result-permerror
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