Reverting changes...

After some tests that was identified that the regex is not the cause of
problem.

src/validation-rules.js

@@ -389,8 +389,9 @@ angular
           break;
         case "email" :
           validator = {
-            // Email pattern pulled from http://www.w3.org/TR/html5/forms.html#valid-e-mail-address
-            pattern: "/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/",
+            // Email RFC 5322, pattern pulled from  http://www.regular-expressions.info/email.html
+            // but removed necessity of a TLD (Top Level Domain) which makes this email valid: admin@mailserver1
+            pattern: "(?:[\\wа-я0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.?[\\wа-я0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[\\wа-я0-9](?:[\\wа-я0-9-]*[\\wа-я0-9])?\\.?)+[\\wа-я0-9](?:[\\wа-я0-9-]*[\\wа-я0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.?){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[\\wа-я0-9-]*[\\wа-я0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])",
             message: "INVALID_EMAIL",
             type: "regex"
           };