of the message. If the first line is a \*(lqReturn-Path\*(rq
field, its address and the current date and time are used. Otherwise,
if the first line has an \*(lqX-Envelope-From\*(rq field, its
-contents (which should already be in the correct format) are used.
+contents (which should already be in the correct format) are used.
Otherwise, a dummy address and the current date and time are used.
.PP
Messages that are packed by