command will be given.
.PP
Although the
-/B HELO
+.B HELO
command is required by RFC\-821, many SMTP servers
do not require it. Early versions of
.I SendMail
a file should be created whose existence means \*(lqlocked\*(rq and
whose non-existence means \*(lqunlocked\*(rq. The name of this file is
constructed by appending \*(lq.lock\*(rq to the name of the file being
-locked. If
-.B LOCKDIR
-is not specified, lock files will be created
+locked. If \*(lq--enable-lockdir=directory\*(rq
+is not specified at build time, lock files will be created
in the directory where the file being locked resides. Otherwise, lock
files will be created in the directory specified by
-.BR LOCKDIR .
+\*(lq--enable-lockdir\*(rq.
.PP
Prior to installing
.BR nmh ,