Hi list,
I have inherited a mail setup that uses qmail as the first port of call
to block relaying, scan for viruses, and forward for virtual domains
that are hosted by us/me.
Any e-mail destined for "local" users is sent onto a Netscape Messenging
Server. This is all set up in the smtproutes file, etc. as per the FAQ
and other documentation, textbook stuff you might say.
I have one particular niggle, that is largely unreproducible on demand
but can occur quite frequently in that sometimes a particular user can
get multiple copies of the same e-mail. From myself originating such an
e-mail from a remote account, the sending mailserver thinks that the
e-mail wasn't delivered and so retries for however long it is set to
with it's configured frequency until it naturally gives up, reporting
the e-mail couldn't be delivered, when in fact 30 or more copies have
been successfully delivered.
In simple terms, either qmail or Netscape isn't saying "yup, got it",
and so the sending server keeps retrying...
I'm trying to narrow down where the fault lies, and because qmail is the
first in line, maybe the fault is there? This may be due to myself not
being sure of how the incoming mail is passed from qmail to our Netscape
Messenging server. Is it treated as two separate transactions or just
one? If it's the latter, it might therefore be the Messenging Server's
fault, and not qmail's, (which I'd be more than happy to accept!).
Can anyone offer any advice? (A plain qmail 1.03 dist is running AFAIK)
Cheers
Matt
