@code{MAILHOST} environment variable.
@item :port
-The port number of the POP server. This can be a number (eg,
-@samp{:port 1234}) or a string (eg, @samp{:port "pop3"}). If it is a
+The port number of the POP server. This can be a number (e.g.@:
+@samp{:port 110}) or a string (e.g.@: @samp{:port "pop3"}). If it is a
string, it should be a service name as listed in @file{/etc/services} on
-Unix systems. The default is @samp{"pop3"}.
+Unix systems. The default is @samp{"pop3"}. On some systems you might
+need to specify it as @samp{"pop-3"} instead.
@item :user
The user name to give to the POP server. The default is the login