PMDF System Manager's Guide

Most PMDF channels depend upon a slave, or server, channel program to receive incoming messages. For most transports supported by PMDF, in particular TCP/IP, you need to make sure that the transport activates the PMDF slave program rather than its standard server.

For PMDF's multithreaded TCP/IP channel this means you need to disable the TCP/IP package's native SMTP server and run the PMDF SMTP server instead; see Section 21.1.3.

If the TCP/IP package is correctly configured to allow the PMDF SMTP server to run, then check that the PMDF SMTP server is indeed running. For the multithreaded SMTP server, this is controlled via the PMDF Dispatcher. The PMDF Dispatcher controls the starting up of an SMTP server or servers, according to your Dispatcher configuration. If the Dispatcher is configured to use a MIN_PROCS value greater than or equal to one for the SMTP service, then there should always be at least one SMTP server process running (and potentially more, according to the MAX_PROCS value for the SMTP service). The DCL command SHOW SYSTEM/NET or the PMDF PROCESS command can be used to check for the presence of SMTP server processes; see Section 33.2.4. Also, the Dispatcher statistics web page can be viewed to check just what connections SMTP processes are currently handling.