"David" == David P James <David> writes:
David> At present I can send email to an account on that server
David> from *within* the lan using the server's internet domain
David> name (davidium.dyndns.org) in the email address, but not
David> from outside (the connection times out, according to the
David> Failed Mail Delivery messages I get 4 hours later). This
David> may be iptables or it may be exim; I'm not sure. The email
David> was sent using exim on my own Debian box within the lan;
David> specifing an external smtp server results in a failed
David> delivery however.
My first guess is your iptables configuratin is not letting smtp
in. See if you can telnet to port 25 (smtp) from outside.
If that works, look in /var/log/exim/* for a record of what went
wrong before examining the exim.conf file for errors. If exim is
really rejecting the messages then there should be something in the
logs.
Cheers!
Shyamal
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