Encrypt a Http Form

<FORM METHOD="POST"
ACTION="mailto:you@yourdomain.com"
ENCTYPE="text/plain"
onSubmit="return valid(this)">
Your e-mail address:<BR><INPUT TYPE="text" NAME="email" SIZE="40"><BR>
Subject:<BR><INPUT TYPE="text" NAME="subject" SIZE="40"><BR>
Comments:<BR><TEXTAREA NAME="comments" COLS="40" ROWS="5"></TEXTAREA><BR>
<INPUT TYPE="submit" VALUE="Send Mail">
</FORM>