.PP
.BR mts :
.RS 5
-The mail transport method to use. The two acceptable options are
+The mail transport method to use. The three acceptable options are
.B smtp
-(which is the default), and
-.BR sendmail .
+(which is the default),
+.BR sendmail/smtp ,
+and
+.BR sendmail/pipe .
.PP
If you use
.BR smtp ,
entry.
.PP
If you use
-.BR sendmail ,
+.BR sendmail/smtp ,
then
.B post
will send messages by forking a
local copy of
.BR sendmail .
-Currently it will still speak SMTP with this local
-copy of
+It will still speak SMTP with this local copy of
+.BR sendmail .
+For backward compatibility,
+.B sendmail/smtp
+can be abbreviated to
.BR sendmail .
+.PP
+The third alternative,
+.BR sendmail/pipe ,
+also forks a local copy of
+.B sendmail
+but feeds the message directly to it, using
+.B sendmail
+.BR -t .
+This replaces the old, undocumented
+.B spost
+mechanism and retains some of its limitations, such as lack of
+support for the
+.B \-whom
+switch and
+\*(lqDcc:\*(rq header field.
.RE
.PP
.BR localname :
localhost
.RS 5
A lists of hosts and networks which to look for SMTP servers when
-posting local mail. It turns out this is a major win for hosts which
-don't run an message transport system. The value of
+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
.B servers
should be one or more items. Each item is the name of a host which
is (hopefully) running a SMTP server.