diff --git a/app/email_utils.py b/app/email_utils.py
index 1904fd3b..e1759ca6 100644
--- a/app/email_utils.py
+++ b/app/email_utils.py
@@ -1321,4 +1321,9 @@ def parse_full_address(full_address) -> (str, str):
     full_address: EmailAddress = address.parse(full_address)
     if full_address is None:
         raise ValueError
+
+    # address.parse can also parse an URL and return UrlAddress
+    if type(full_address) is not EmailAddress:
+        raise ValueError
+
     return full_address.display_name, full_address.address
diff --git a/tests/test_email_utils.py b/tests/test_email_utils.py
index bd4aac38..8c9a4c8b 100644
--- a/tests/test_email_utils.py
+++ b/tests/test_email_utils.py
@@ -3,6 +3,7 @@ import os
 from email.message import EmailMessage
 
 import arrow
+import pytest
 
 from app.config import MAX_ALERT_24H, EMAIL_DOMAIN, BOUNCE_EMAIL, ROOT_DIR
 from app.db import Session
@@ -134,6 +135,9 @@ def test_parse_full_address():
         "abcd@gmail.com",
     )
 
+    with pytest.raises(ValueError):
+        parse_full_address("https://ab.cd")
+
 
 def test_send_email_with_rate_control(flask_client):
     user = User.create(