PMDF System Manager's Guide
PMDF-REF-6.0

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23.2 Controlling the SMTP server

The multithreaded TCP SMTP channels' SMTP server is handled by the PMDF Service Dispatcher. Each Worker Process the Service Dispatcher creates for the multithreaded SMTP server may handle multiple, simultaneous connections, and the Service Dispatcher may create multiple such Worker Processes. To start the SMTP server, you must start the PMDF Service Dispatcher.

Note:

Be certain to disable any other SMTP server, e.g., a native SMTP server shipped with a TCP/IP package, as described above in Section 23.1.3 before asking the Service Dispatcher to start the multithreaded SMTP server; the Service Dispatcher will not be able to start the multithreaded SMTP server if another process has already bound to port 25.

On OpenVMS platforms, the Service Dispatcher may be started with the command 

$ PMDF STARTUP DISPATCHER
On UNIX platforms, the Service Dispatcher may be started with the command 
# pmdf startup dispatcher
On NT platforms, the Service Dispatcher may be started with the command 
C:\> pmdf startup dispatcher

If you modify your PMDF configuration or options that apply to the multithreaded TCP SMTP server, you must restart the server so that the new configuration or options will take effect. On OpenVMS platforms, use the command 

$ PMDF RESTART SMTP
On UNIX platforms, use the command 
# pmdf restart smtp
On NT platforms, you must restart the Dispatcher itself using the command 
C:\> pmdf restart dispatcher
A new SMTP server process will be created, using the new configuration, and will process subsequent incoming SMTP connections. The old TCP SMTP server process will finish up any SMTP sessions it might have and exit when they are finished.

Note that you may stop the TCP SMTP server at any time. On OpenVMS platforms, use the command 

$ PMDF SHUTDOWN SMTP
or on UNIX platforms use the command 
# pmdf shutdown smtp
which will shut down the server gracefully, allowing any outstanding connections to finish up.

On NT, you must shut down the Dispatcher itself, or edit the Dispatcher configuration removing the SMTP service and then restarting the Dispatcher.

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