3Com 3CR3MFA-92 User Manual page 122

122 C 8: M
HAPTER ONITORING
A A S
CTIVITY ND TATUS
Utility Functions
In the System Mgmt -> Status and Utility screen, there are utilities that
can be used to help troubleshoot network connectivity and mail queue
issues.
Flush Mail Queue — Use this utility if you have a high amount of
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deferred mail that you would like to try and delivery. In environments
with a high amount of deferred mail, this process can take a very long
time. If the deferred mail queue continues to grow, there are other
problems that are preventing the delivery of mail and the Flush button
should not be clicked again.
SMTP Probe — The SMTP (Simple Mail Transport Protocol) Probe is
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used to test email connectivity with a remote SMTP server. This allows
you to verify that a certain SMTP server is responding to connection
requests and returning a valid response. If you are having trouble
delivering mail to a specific server, test your SMTP connection using
this utility.
Ping and Traceroute — Use the Ping and Traceroute utilities to ensure
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network connectivity with another host. From the 3Com Email
Firewall, try to ping hosts both on the internal and external networks.
You should also try to ping the firewall, DNS server, and external
router. Try to ping the 3Com Email Firewall from these locations to
ensure you have connectivity.
Traceroute is used to see the routing steps between two hosts. If you
do not have connectivity, you can use traceroute to see where exactly
the packet is losing its connection.
Hostname Lookups — Use this test to ensure that hostnames are
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being properly resolved by the DNS server.