> Sorry, /etc/network.conf reads Version 1.3.2, September 29, 2001
>
> The e-mail sent from outside (Yahoo) appears in OUR sendmail queue
when it
> gets deferred with the message:
> stat=Deferred: Connection timed out with XX.XXX.XXX.XX (our firewall
> address).
>
> The sendmail (8.11) is not doing anything non-standard. Just the basic
> configuration.

OK, when you say "OUR sendmail queue", is that the machine behind the
Dachstein firewall, or are you running a large network where "OUR
sendmail queue" is a corperate-wide mail reciever, which re-directs mail
to multiple secondary MTA's?  Assuming the former, mail *IS* actually
getting to your system, but sendmail is apparently not correctly
configured to recognize the addresses as being local.  Instead, it
sounds like sendmail is trying to relay your messages to what it thinks
is their correct final destination, which is your firewall address
(which you presumably have listed in an MX record for your domain).
Connecting to a port-forwarded service via it's external IP from within
the internal network, which is what your sendmail system is trying to do
(ie it's trying to talk to itself, via the port-forwarding setup on the
firewall) won't work (at least not without some packet routing
gymnastics :-), so as far as sendmail is concerned, it can't talk to the
"authoritative" MTA, and even if it could, you'd just wind up with a
mail loop.

You need to check your sendmail configuration, and try running some
tests on the e-mail addresses you're using to send mail.  I strongly
suspect you'll find an error in the sendmail setup that's causing
addresses to not be treated as local.  You'll have to dig through the
sendmail docs for the test procedures (or maybe a kind soul on list will
have helpful info)...I'm more familiar with exim and qmail...haven't
done any hands-on configuration of sendmail for 2-3 years (and I have
yet to unpack my O'Reilly "bat" book from a recent move :-)

> Under "TCP servers open to the outside world" we have:
> EXTERN_SMTP_PORTS = "0/0_ntp 0/0_smtp"
>
> and under "UDP servers open to the outside world" we have:
> EXTERN_UDP_PORTS = "0/0_domain 0/0_bootpc 0/0_ntp"

Looks OK, assuming EXTERN_SMTP_PORTS is actually EXTERN_TCP_PORTS...

Charles Steinkuehler
http://lrp.steinkuehler.net
http://c0wz.steinkuehler.net (lrp.c0wz.com mirror)



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