Nedd Help PLZ! simple but Im stuck!

ok . I wanna put a mailing list field on my website … just a simple text field that u enter ur e-mail and when u press the submit button it send me a mail with the subject being “Mailing list addition” and the body shows the users email adress … but i dont want the email editor to launch … is this possible ??? and how do i manage to do this ?

Thanx in advance