This works for 4.019.
Make sure the path is correct for your x-cart installation...
<Table>
<FORM action="/store/mail/subscribe.php" name="subscribeform">
<INPUT type="hidden" name="redirect" value="customer">
<TR>
<TD>
Your email:
<BR>
<INPUT type="text" name="newsemail" size="16">
<BR>
<A href="javascript
:document.subscribeform.submit()" class="VertMenuItems"><FONT class="VertMenuItems">Subscribe </FONT><IMG src="/store/skin1/images/go_menu.gif" width="27" height="14" border="0" align="absmiddle"></A>
</TD>
</TR>
</FORM>
</TABLE>