VM3 email conditional @ field issues

[LINHOS]

Save save guys, I do not know if anyone else there besides me noticed the problem at checkout virtuemart 3, where the field * Email (buyer fields) you can fill without the @ even so virtuemart recognizes and makes the call , someone knows what file should I change in virtuemart 3 to give conditional @ mandatory in the email field in the VM had a edit.adress.php file, since the VM3 this file no longer exists to change this conditional ...ACKUVD