diff --git a/aurweb/util.py b/aurweb/util.py
index 776cf516..1f75ac22 100644
--- a/aurweb/util.py
+++ b/aurweb/util.py
@@ -13,7 +13,7 @@ from urllib.parse import urlparse
 import fastapi
 import pygit2
 
-from email_validator import EmailNotValidError, EmailUndeliverableError, validate_email
+from email_validator import EmailSyntaxError, validate_email
 from fastapi.responses import JSONResponse
 
 import aurweb.config
@@ -51,10 +51,8 @@ def valid_username(username):
 
 def valid_email(email):
     try:
-        validate_email(email)
-    except EmailUndeliverableError:
-        return False
-    except EmailNotValidError:
+        validate_email(email, check_deliverability=False)
+    except EmailSyntaxError:
         return False
     return True
 
diff --git a/test/test_accounts_routes.py b/test/test_accounts_routes.py
index 01e61101..30531ac7 100644
--- a/test/test_accounts_routes.py
+++ b/test/test_accounts_routes.py
@@ -446,18 +446,6 @@ def test_post_register_error_invalid_email(client: TestClient):
     assert "The email address is invalid." in content
 
 
-def test_post_register_error_undeliverable_email(client: TestClient):
-    with client as request:
-        # At the time of writing, webchat.freenode.net does not contain
-        # mx records; if it ever does, it'll break this test.
-        response = post_register(request, E="email@bad.c")
-
-    assert response.status_code == int(HTTPStatus.BAD_REQUEST)
-
-    content = response.content.decode()
-    assert "The email address is invalid." in content
-
-
 def test_post_register_invalid_backup_email(client: TestClient):
     with client as request:
         response = post_register(request, BE="bad@email")