POP3 server

The interface measures POP3 server response times for points with Location2 set to 7. TCPResponse connects to the POP3 port of the specified machine, for example, DEVICE=mail.somecompany.com in the InstrumentTag. The POP3 port is either the default port (110) or a user-specified port, by PORT= in the InstrumentTag. After establishing the connection, the Interface waits for the POP3 server to send a message that contains the text +OK. In other words, TCPResponse performs a substring search for +OK in the received reply.

Note: RFC 1939 defines a status code of +OK as good status indication. You can instruct the interface to perform a substring search for a different text string by specifying the case-sensitive string by REPLY= in the InstrumentTag. The keyword REPLY itself is not case sensitive.

The response time measured by the interface is the amount of time from time of the connection request to the time when the interface receives the message containing +OK. If the interface does not receive a message containing +OK, it writes the value Bad Input. If the interface does not receive a reply within a user-specified timeout duration, it writes I/O Timeout.