Hello all,
I have a SMTP gateway in my DMZ running QMail 1.03, this gateway
forwards
all email bound for our domain (i.e. foo.com) inside the private network
to a Exchange server (yah I know, however I had no choice in the matter,
damb outlook!). This process works fine for simple messages, plain text,
nothing special. However the moment a message is sent to us with a
attachment it takes anywhere from 2 hours to several days before we see
it
in our servers. I have been trying to track down the problem with no
luck.
These are things I know about the problem:
Once the message is injected into QMails queue it is forwarded
immediately.
To the best of my knowledge QMail is operating correctly (i.e.
tcpserver)
The MX record for the domain in question is setup correctly.
The transmitting sites have recent DNS updates reflecting the correct
MX record.
There is no pattern to who or what will cause the duration of the
delay (it varies even at the same site and not dependent on file
size)
Knowing all of this I want to say that it is somewhere outside of our
site, however, why would so many domains be affected?
I'm not quite sure where to go for further information regarding such a
problem, however I am continuously surfing...If anyone has experience
with
such a problem, or insight into the cause and or solution I would be
greatly appreciative.
Thanks in advance,
Mike Moulton
