From cf3a2258b2056a2263c31075aa4ffaf6dad8563a Mon Sep 17 00:00:00 2001
From: Son NK <nguyenkims@hotmail.com>
Date: Mon, 18 Nov 2019 15:08:04 +0100
Subject: [PATCH] return 510 if no such alias

---
 email_handler.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/email_handler.py b/email_handler.py
index 7d90d6c8..bc8d9127 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -92,6 +92,10 @@ class MailHandler:
 
             with app.app_context():
                 gen_email = GenEmail.get_by(email=alias)
+                if not gen_email:
+                    LOG.d("alias %s not exist")
+                    return "510 Email not exist"
+
                 website_email = parse_srs_email(envelope.mail_from)
 
                 forward_email = ForwardEmail.get_by(