Cisco IronPort AsyncOS 7.5 for Email Daily Management Guide
Chapter 9 Testing and Troubleshooting
If you suspect problems with delivering email from the appliance, try the
Determine if the problem is domain-specific.
command to get immediate information about the email
queue and determine if a particular recipient domain has delivery problems.
Are there problem domains returned when you sort by “Active Recipients?”
When you sort by Connections Out, does any one domain reach the maximum
connections specified for a listener? The default maximum number of
connections for a listener is 600. The default maximum system-wide number
of connections if 10,000 (set by the
command). You can
examine the maximum number of connections for a listener using the
-> injector_number ->
Are the connections for a listener further limited by the
(either by system maximum or by Virtual Gateway addresses)? Use this
command to examine the
“Drill-down” using the
command on the top domains listed from
the results listed by the
Is the host available and accepting connections?
Are there problems with one specific MX record mail server for the given
command reports the last “5XX” status code and description
returned by the host if there is a 5XX error (Permanent Negative Completion
reply) for the specified host. If the last outgoing TLS connection to the host
command displays the reason why it failed.
Configure and/or examine the domain debug, bounce, and text mail logs to
check if the recipient host is available.
Domain debug logs record the client and server communication during an
SMTP conversation between the appliance and a specified recipient host.
This log file type can be used to debug issues with specific recipient hosts.