Submitting form results to two locations

Please could anyone help me with a small problem I'm having. I have an existing mailing list program written in perl and the sign up process is done through a cgi form. What I want to do is modify my contact page and add an option for people to subscribe at the same time, which means I need to post the form results to the email address using something like formmail.pl but also post the email address to the cgi script. Any ideas? Many thanks in advance for any replies. Tom