what is correct url

wordpress is installed on subdomain say https://www.xyz.cm/myproject/ ,here i have installed multisite wordprss,on one subsite i am using form
code is
<form method=”post” name=”myemailform” action=”https://www.xyz.com/myprojects/wp-content/themes/onepirate/formemail.php”&gt;
<input type=”submit” value=”Send Form”>
</form>
on this action url transfer the page to main domain page ie https://www.xyz.com
what is the reason