Mailfetch::Rule::MIMEPart::HTML::BogusTags - does the mail bogus HTML tags?
perl -MMailfetch::Rule::MIMEPart::HTML::BogusTags=test,mailfile -e1
Returns true if the mail contains an HTML part and the HTML part contains bogus (non-HTML-3.2) tags, resp. whatever HTML::Tagset considers valid.