"Ruud H.G. van Tol" <rvtol(_at_)isolution(_dot_)nl> writes:
While ssh tunneling may be an option for some, I doubt large ISPs will
ever consider it as "Best Practice" for sending mail ;-)
The context is: SPF .AND. external network.
For that combination, I don't see why not.
You seem to be implying that validating SPF checks is an obscure
concern, and can therefore be pacified with an obscure solution. I don't
know what the situation is in your neck of the woods, but the larger
American ISPs are currently working to make SPF (along with DomainKeys)
pragmatic solutions to sender authentication. If they wish for that to
happen, then the transition has to be easy if not nearly transparent to
the end user. Requesting that Aunt Nellie change her outbound mail
server/port is realistic, expecting her to port forward via ssh is
not.
I'll end with that, as I've clearly strayed off-topic.
Regards,
Robert Arnold
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