--Vitaly Voropinov wrote on 04.04.2002 16:18 +0400:

> I've got some problem on FreeBSD 4.2. Mail don't reach some hosts and their
> mail don't reach mine one. What may it be? Error in log file: Connection
> unexpectedly closed by remote host. Why? I really don't know. I think that be
> a firewall denying but it was absolutely inactive and problem stay all time
> :( 

If the version of courier is as old as your FreeBSD I'd suggest
you upgrade both of them.
 
> I'm not expert with Courier and Unix-system, I'm beginner :) Please help me!
> (may be better to install another mail server?)

Since you did not give any useful information:
Fire up telnet to the remote host on port 25 and see what happen,
start a sniffer and log the communication between the servers.

Roland


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