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Frank Ellermann wrote:
Julian Mehnle wrote:
how can we be sure that the rejection demonstrated on that page
is actually due to an SPF Fail?
| Apparently Gmail rejects SPF FAIL after DATA:
Well, "apparently" isn't the same "surely" :-) Obviously they looked at
the DATA for their decision, so they likely use more than only one
indicator, otherwise they'd be wasting bandwidth.
For the record: It's possible that they simple always reject only after
DATA in order to collect as much information as possible on all messages,
e.g. for statistics. If they rejected SPF Fails before DATA, their spam
stats would get distorted.
Anyway, I think we can only be about 90% certain that they actually reject
due to SPF Fail (be it before or after DATA). There _might_ be other
reasons for the rejection you observed. We could ask them to know it for
sure, though.
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