From c726213680c5ac56ba510220ea09b08ce041f1ac Mon Sep 17 00:00:00 2001
From: Michael Telatynski <7t3chguy@gmail.com>
Date: Tue, 13 Apr 2021 10:03:50 +0100
Subject: [PATCH] Switch to a spec conforming email validation Regexp

---
 src/email.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/email.ts b/src/email.ts
index 6642a51541..0476d4467c 100644
--- a/src/email.ts
+++ b/src/email.ts
@@ -14,7 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-const EMAIL_ADDRESS_REGEX = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}$/i;
+// Regexp based on Simpler Version from https://gist.github.com/gregseth/5582254 - matches RFC2822
+const EMAIL_ADDRESS_REGEX = new RegExp(
+    "^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*" + // localpart
+    "@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$", "i");
 
 export function looksValid(email: string): boolean {
     return EMAIL_ADDRESS_REGEX.test(email);