-address, followed by whitespace, and followed by a time stamp. The
-sender address is expected to be an
-.B addrspec
-as defined in appendix D of RFC 822.
-.PP
-The date is expected to be formatted according to the following
-syntax (represented in the augmented Backus-Naur formalism used by
-RFC 822):
-.PP
-.TS
-lll.
-mbox-date = weekday month day time [ timezone ] year
-weekday = "Mon" / "Tue" / "Wed" / "Thu" / "Fri"
- / "Sat" / "Sun"
-month = "Jan" / "Feb" / "Mar" / "Apr" / "May"
- / "Jun" / "Jul" / "Aug" / "Sep"
- / "Oct" / "Nov" / "Dec"
-day = 1*2DIGIT
-time = 1*2DIGIT ":" 1*2DIGIT [ ":" 1*2DIGIT ]
-timezone = ( "+" / "-" ) 4DIGIT
-year = ( 4DIGIT / 2DIGIT )
-.TE
-.PP
+address, followed by whitespace, and followed by a time stamp. This
+line is often called From_ line.
+.PP
+The sender address is expected to be
+.B addr-spec
+as defined in \fBRFC2822\fP 3.4.1. The date is expected to be
+.B date-time
+as defined in \fBRFC2822\fP 3.3.