Using Sendmail on MPE - April 2003

Using Sendmail on MPE - Solution Symposium West Page 59April 24, 2003
troubleshooting
(cont.)
•if syslog shows DNS lookup
failures:
– run the dnscheck script to verify
DNS is configured properly
– verify that your firewall allows your
3000 to talk to DNS servers on
port 53
•if syslog shows connection failures
to remote mail servers, verify that
your firewall allows your 3000 to
connect to port 25; if it does not,
you may need to configure
sendmail.cf to use a smart host mail
relay
•long delays submitting new
messages are indicative of DNS
problems; check syslog and run the
dnscheck script