+The search in the mail bodies does not decode mimencoding mails, hence
+will not catch patterns in encoded text.
+
+The mbox format is not clear for multipart messages, since the 'From'
+may not always be quoted properly, so mymail uses a strict regexp to
+recognize such lines.
+
+The date format for the Date: field is not standardized, and may not
+be parsed properly. When that happens, the time stamp from the
+leading 'From' line of the mail, which has a canonical form, is used.