Marc Sherman wrote:
Bill Hacker wrote:
But what is important here is also that Exim appears to NOT have
been set to act on the missing message-id header in this case - nor
SpamAssassin.
This appears to be a case of the T-Bird MUA *on it's own* tagging as
junk.
No, Bill, you've misunderstood the OP's scenario. Thunderbird and
Outlook are the _sending_ MUAs.
Given. But yes, I had read it that they were also the *receiving* MUA's.
Exim is the _sending_ MTA. Hotmail.com
is the recipient MTA and MUA. Hotmail is spam-binning the message sent
by Outlook, and the OP can't figure out why.
As the spam score was actually numerically negative, it then appears that
Hotmail (still Qmail?) might be applying a check for the missing message-id
So far, we've identified two very plausible differences between the two
messaages which Hotmail could be acting on. We know that Hotmail uses
Sender ID, which obeys SPF records. We also know that Hotmail uses a
number of poorly documented spam filter heuristics, which could be
noticing the missing Message-ID, so that's something the OP should fix
as well.
ACK. Nothing else really stands out.
Tho' Hotmail and SPF sound like an accident in search of a place to
occur.. ;-)
IMNSHO, *this* case is just not an Exim issue.
I certainly agree with you on this one, with the small exception that
the OP should definitely configure submission mode for his authenticated
and local submissions, to solve the Message-ID problem.
Agree that.
Falls into the 'we shouldn't ever have to modify..' category.
But with Micro-whatzit at large in the body politic, 'What's a Mother to
do?'
We considered adding the missing 'message-id' header here.
Fortunately, our vanishingly small Outlook user base made 'download a
proper MUA'
an enforceable - and better- alternative all around.
Inbound is another story entirely, so we no longer check for message-id.
Best,
Bill
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