-.IP \fB\-\-input\fR,\ \fB\-i\fR
-Specify the input file containing a list of email addresses, rather
-than using stdin (the default).
-
-.IP \fB\-\-output\fR,\ \fB\-o\fR
-Specify the output file to which the good addresses will be written,
-rather than using stdout (the default).
+.IP \fB\-\-rfc5322\fR,\ \fB\-r\fR
+Verify addresses against RFC 5322 rather than a naive regular
+expression. This is much more lenient than the default.