TCP Port Selection

	This option only applies to IMAP servers, and allows you to
select an alternate port on the server. A TCP port is a communications
channel much like a TV channel. IMAP by default runs on channel 143.
In some areas where a server needs to support multiple version of
IMAP, this may be located elsewhere (145 is a popular choice). Do not
change this unless you know which TCP channel you server uses. 
	EXCEPT, by setting this number to '0', you will instruct ML to
attempt to communicate with the server using the "rsh" protocol. If
the server is setup appropriately, and your machine has "rsh" access
to it, it is possible to login automatically without requiring a
password. This is generally disastrous on machines connected via
dialin lines; and may hang the system. Contact your server
administrator or Internet Service Provider to find out if this option
is available from your system.