Integer value. Sets the port number to which the SMTPL.EXE "listener" will bind at boot time.
Under normal circumstances it is not advisable to set this parameter. It is only for use when it becomes necessary to force SMTPL.EXE to "listen" out on a non-standard port (i.e., other than the standard SMTP port, port 25). This parameter would normally be set only if another SMTP mail application were running on the same machine as LISTSERV and it were necessary to avoid an SMTP port conflict. However, please note that this implies that the other SMTP mailer is able to forward LISTSERV's mail to the non-standard port you define.
Normally not set in SITE.CFG but the default would be