The second reply is sent to be nice. ASSP uses the 'DelayError' to do this
- which is not 100% RFC conform. I'll change this to '421 closing
transmission' - which is 100% RFC conform.
At least this reply has nothing to do if or where a message is stored in
the corpus.
Thomas
Von: Grayhat <[email protected]>
An: [email protected]
Datum: 05.03.2012 09:15
Betreff: [Assp-test] Graylisting issues
Hi there; just stumbled upon what I see as a bug and a source of
issues; here's what I noticed
Sometimes, under certain conditions ASSP emits both a reject message
(message score over limit), that is a "550 ..." *followed* by another
SMTP tempfail "451 retry later" which comes from the graylisting; now,
while this in *theory* shouldn't be a problem, since the sending party
will just ignore the second message, it IS a problem for blockreport;
basically here's what (I think) happens
ASSP checks the messages through various filters, the score goes up to
the limit so, it emits the "550" to reject the message, at that point,
for whatever reason (possibly a bug), the "delaying" (graylisting) code
kicks in, finds that the "tuple" isn't listed and decides to ALSO emit
the "451" and at the *same time* this causes the rejected message to
NOT BE SAVED into the spamfolder so, in effect a user willing to
recover it, won't be able to do so. I think that, in case a given SMTP
session gets a reject, the filtering should stop there and deal with
the message, storing it as needed
Note to Thomas: in case you'll need further details/infos, I may send
your way some log snippet which shows the above behaviour
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