>3) It may be a problem with resolving the hostnames in outgoing mail.
>Make sure you have the IP address of a working DNS server in the Domain
>Name Server field. Make sure you can ping the DNS address from the IMail
>PC. (Use the DNS Lookup utility to make sure that your DNS is working.)
>
>Is it completely necessary to be able to ping the DNS for IMAIL to work
>properly?
it's an indication of connectivity but not of DNS operation. it is
certainly not "completely necessary".
> I mean, the PING could be filtered, and still the DNS be working,
>right?
sure, ping and DNS aren't the same protocols or ports.
nslookup (or dig, see my sig) from the Imail machine directed to the
NS used by Imail simulates better
Imail's use of DNS.
DNS might work, but too slowly (as I saw yesterday with UK Imail user
who installed IMGate), so that Imail's DNS query times out and Imail
queues the msg. DNS slowness could certainly be a pb in .ar when
querying elsewhere, in my experience.
dig from the Imail machine to the Imail DNS will show you the length
of time queries take in milliseconds. note the ensuing queries will
be answered from DNS cache and be much faster.
If you have a lot of SMTP processes "stuck" in memory and very slow
mail delivery, you may have a "killer" msg whose bad format kills
SMTP processes.
Len
http://BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-spam mail gateways
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