Perl and Tidy

I am looking for a utility like Tidy written in Perl or at least in PHP. If not something like Tidy then at least an HTML validator.
All I want is this: using cron read the POP3 account and then check if the e-mails written in HTML are valid. With Tidy I could "clean" the invalid e-mails or with something similar with Tidy I could be aware which e-mails are invalid and check them manually.

I have found the following Perl validators but I don't know Perl and I think that they are not what I am looking for.

http://www.crossmyt.com/hc/htmlchek/htmlchek.html
http://www.htmlhelp.com/tools/validator/source.html.en
http://www.cpan.org/modules/by-authors/id/S/SA/SAIT/HTML-Validator-0.04.readme
http://validator.w3.org/source/
http://packages.debian.org/unstable/web/wdg-html-validator.html

Can somebody help me?