-A lists of hosts and networks which to look for SMTP servers when
-posting non\-local mail. It turns out this is a major win for hosts
-which don't run an message transport system. The value of
+A single hostname to be used when performing mail submission via SMTP.
+Previous versions of
+.B nmh
+supported multiple hostnames for
+.BR servers ,
+but the current version of
+.B nmh
+only supports a single entry (the name is kept for backwards compatibility
+reasons). This can be overridden via the
+.B \-server
+switch to
+.IR send (1).
+It is not possible to change the mail submission port number in the