Cisco Cisco Email Security Appliance X1050 トラブルシューティングガイド

Contributed by Chris Haag and Enrico Werner, Cisco TAC Engineers.

Oct 13, 2014

Introduction
How to troubleshoot delivery issues on the ESA?
Prerequisites
     Requirements
     Components Used
Background Information
Troubleshooting Steps
     tophosts command
     hoststatus command
     nslookup command
     dnsflush command
     SMTPPING tool
     delivernow command
Related Information

This document describes how to troubleshoot delivery issues on the Email Security Appliance (ESA).

Cisco recommends that you have knowledge of these topics:

Track an outbound message through the mail logs or Message Tracking

• 

Access to the CLI of the ESA

• 

The information in this document is based on AsyncOS for Email Security.

The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.