The bandwidth light POP3 Monitor opens a connection to the specified POP3 server and waits for the Server to respond with a standard "Service Ready for a new user" (code 220) message.
Upon receipt of the opening message, the POP3 Monitor safely disconnects from the server by sending a QUIT command to terminate the connection.
If the POP3 server fails to respond, or responds with an error code indicating that the Service is not available, ipMonitor considers the test to have failed.
Use the POP3 Monitor to test that:
The Test Parameters dialog box is used to specify the parameters that the POP3 Monitor will use to open a connection to the POP3 server.
IP Address / Domain Name
Specify the location of the POP3 server you want to monitor. Both IP Address and Domain Name are valid entries.
Examples of valid Domain Names are: mail.xyzcompany.com and xyzcompany.com.
An example of a valid IP address is: 10.200.50.11
Note: Entering an IP address will eliminate any variables introduced by performing a lookup on the DNS server. If your network uses a DHCP server to dynamically assign IP addresses, enter an IP address only if it is "reserved"; otherwise, enter a Domain Name.
Specify the Port Number that the POP3 server responds on. By default, the standard Port Number used for POP3 communication (Port 110) is already entered.
When the Monitor is in an Up state, test results are reported as shown in the example below:
rtt - Round-Trip Time. This value indicates the time it took the test packet to reach the monitored resource and return a response to ipMonitor. Round-trip time is measured in milliseconds (ms).
When the Monitor is in a Warn, Down, or Lost state, the Last Result field indicates the problem encountered. Different Monitor types generate specific Error Codes in accordance with the technical capabilities of the Monitor. Refer to the Error Codes section of this document for details.
If you need to test your POP3 server's ability to log in a client and test an email round trip, refer to the POP3 - QA Monitor.
For information on settings common to all Monitor types, such as Identification, Timing, Notification Control and Recovery Parameters, refer to General Monitor Settings.
The following error codes are generated by the POP3 Monitor. Error codes are displayed in Real-time and Historical Reports. They can also be added to Alerts using Tokens.
|Configuration information for this item is missing some required fields||A required element(s) for Monitor connectivity or testing was not supplied to ipMonitor.|
|Unable to connect to the remote device||The specified address to the connection-based Service is unavailable.|
|Could not obtain an IP address for the remote device||The supplied address was not a valid IP address OR the Server Domain Name could not be translated into an IP address. The Server Domain Name may refer to a local machine name, or a fully qualified domain name.|
|The remote device timed out before sending a response||The resource being monitored did not respond within the maximum allowable time.|
|Unexpected disconnection from the remote device||The server disconnected during the test transaction.|
|The response from the remote device does not adhere to protocol specification||The resource is either not adhering to the protocol standard or ipMonitor does not understand a proprietary change in the protocol.|
For information on other features and concepts related to those discussed in this article, refer to the following ipMonitor resources:
Last Updated: March 30, 2007 | What did you think of this topic?