http://mail.cadillac.net/
The file has a index.tmpl file that comes with it. It's a (almost) pure HTML page that you can edit to please your tastes. If you do a good job of editing it, drop me a note.
http://www.tnpi.biz/computing/mail/toaster/Mail-Toaster.tar.gz
It's a component of the Mail::Toaster perl package.
Yes, you will need still need to install MATT::Bundle and Mail::Toaster but once that's done, Mail::Toaster::CGI will work for you.
To install Mail::Toaster, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Mail::Toaster
CPAN shell
perl -MCPAN -e shell install Mail::Toaster
For more information on module installation, please visit the detailed CPAN module installation guide.