To use ESMTP with mutt add the following line

	set sendmail="/path/to/esmtp"

to your ~/.muttrc and create a ~/.esmtprc (see the included sample.esmtprc for
an example.)

ESMTP supports SENDMAIL envelope sender '-f' flag, so don't forget to add

	set envelope_from=yes

as well.

For debugging purposes you may prefer using the follwing shell script which
logs ESMTP to 

	#!/bin/sh
	LOGFILE=/tmp/esmtp.log
	echo $0 $@ > $LOGFILE
	/path/to/esmtp -v $@ >> $LOGFILE
	exit $?

Save it as esmtp.sh, make it executable, and put in your ~/.muttrc

	set sendmail="/path/to/esmtp.sh"

instead.