.RB [ \-whatnowproc
.IR program ]
.RB [ \-nowhatnowproc ]
+.RB [ \-atfile ]
+.RB [ \-noatfile ]
+.RB [ \-fmtproc
+.IR program ]
+.RB [ \-nofmtproc ]
.RB [ \-build ]
.RB [ \-file
.IR msgfile ]
and the pathname of
the folder containing the message is stored in the environment variable
.BR $mhfolder .
+The creation of the \*(lq@\*(rq file and associated environment variables
+can be controlled via the
+.B \-atfile
+and
+.B \-noatfile
+options.
.PP
Although
.B repl
being replied\-to, and then outputs each line of the body prefaced with
the \*(lq>\*(rq character.
.PP
+You can also use an external format program to format the message body.
+The format program is specified by the
+.IR formatproc
+profile entry, and is enabled by the \*(lqformat\*(rq flag. A message
+filter using an external format program would look like this:
+.PP
+.RS 5
+.nf
+body:component=\*(lq>\*(rq,\|nowrap,\|format
+.fi
+.RE
+.PP
+See the
+.BR mhl(1)
+documentation for more information. The format program can be changed by
+the
+.B \-fmtproc
+.I program
+and
+.B \-nofmtproc
+switches.
+.PP
To use the MIME rules for encapsulation, specify the
.B \-mime
switch.
.RS 5
.nf
.ta \w'Escape 'u +\w'Returns 'u
-.I Escape Returns Description
+.I "Escape Returns Description"
fcc string Any folders specified with `\-fcc\ folder'
.fi
.RE
.RB ` \-inplace '
.RB ` \-nomime '
.RB ` \-noquery '
+.RB ` \-atfile '
.RB ` "\-width\ 72" '
.fi