server fulfills the same purpose here as the server parameter on the XCALL line and is used only if the server parameter in the XCALL is blank or not specified. Since a given installation will probably always use the same server, it may be much more convenient to put the information here in the configuration file than having to embed it in the application. Note that although SMTP servers almost always use port 25, if for some reason yours doesn’t, you can append the port number to the host name or IP address with a colon separating them. For example:

SERVER = localhost:10025    ; local SMTP server on port 10025

SERVER = 1.2.3.4:9925       ; SMTP server at 1.2.3.4 port 9925

SERVER = mail.myisp.net     ; SMTP server at ISP