.TP
\fB-o <output filename>\fR, \fB--output <output filename>\fR
set the db filename pattern for recursive search
+.TP
+\fB-a <search field>\fR, \fB--default-search <search field>\fR
+set the default search field: If a search request is not understood,
+it is interpreted as the regexp with this default search field
.SH "ENVIRONMENT VARIABLES"
\fBd <regexp>\fR (date) selects mails whose field Date: matches the regexp.
.TP
\fBb <regexp>\fR (body) selects mails whose body matches the
-regexp. This requires reading the original mboxes completely, which
-can be slow. Header conditions have to be fulfilled before checking
-the body ones, which may speed things up.
+regexp. Evaluatin such a condition requires to read the original
+mboxes completely, which can be slow. However, header conditions are
+checked first to read the bodies only for mails which fulfill them
+entirely.
+.TP
+\fB8h\fR selects mails received during the last 8 hours.
+.TP
+\fBtoday\fR, \fB24h\fR, \fBweek\fR, and \fBmonth\fR selects mails received during the last 24, 7 * 24 hours or 31 * 24 hours.
+.TP
+\fByesterday\fR selects mails received between 48h and 24h ago.
+.TP
+\fBmonday\fR, \fBtuesday\fR, ..., \fBsunday\fR selects mails received
+the most recent such day
.SH "EXAMPLES"