+.RS 4
+.TP 4
+.B files
+
+Output the number of files associated with matching messages. This may
+be bigger than the number of matching messages due to duplicates
+(i.e. multiple files having the same message-id).
+.RE
+.RE
+
+.RS 4
+.TP 4
+.BR \-\-exclude=(true|false)
+
+Specify whether to omit messages matching search.tag_exclude from the
+count (the default) or not.
+.RE
+
+.RS 4
+.TP 4
+.BR \-\-batch
+
+Read queries from a file (stdin by default), one per line, and output
+the number of matching messages (or threads) to stdout, one per
+line. On an empty input line the count of all messages (or threads) in
+the database will be output. This option is not compatible with
+specifying search terms on the command line.
+.RE
+
+.RS 4
+.TP 4
+.BR "\-\-input=" <filename>
+
+Read input from given file, instead of from stdin. Implies
+.BR --batch .