+--with-mts=MTS (DEFAULT is smtp)
+ Specify the default mail transport system you want to use. The two
+ acceptable options are "smtp" (which is the default), and
+ "sendmail". This value will be put into the mts.conf file. You
+ may find it convenient to specify a value at configure-time,
+ however, so that each time nmh is reinstalled, the right value will
+ be there.
+
+ If you use "smtp", this will enable a direct SMTP (simple mail
+ transport protocol) interface in nmh. When sending mail, instead
+ of passing the message to the mail transport agent, `post' will
+ open a socket connection to the mail port on the machine specified
+ in the `mts.conf' file (default is localhost), and speak SMTP
+ directly.
+
+ If you use "sendmail", then `post' will send messages by forking a
+ local copy of sendmail. Currently it will still speak SMTP with
+ this local copy of sendmail.