entity_validator.py

@@ -66,7 +66,7 @@ def validate(entity):
         'email': {
             'type': 'string',
             'required': True,
-            'regex': '^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-.]+$'}, 
+            'check_with': valid_email}, 
         'fullname': {
             'type': 'string',
             'required': True},

requirements.txt

@@ -2,4 +2,5 @@ tornado==6.0.4
 isodate==0.6.0
 pytest==5.4.1
 schwifty==2020.11.0
-Cerberus==1.3.2
+Cerberus==1.3.2
+validator-collection==1.5.0

validation_functions.py

@@ -1,5 +1,6 @@
 from schwifty import IBAN, BIC
 import datetime
+from validator_collection import validators, errors
 
 def valid_iban(field, value, error):
     try:
@@ -28,4 +29,11 @@ def valid_money_amount(field, value, error):
         float(value)
         return True
     except (ValueError, TypeError):
-        error(field, 'not a valid money value')
+        error(field, 'not a valid money value')
+
+def valid_email(field, value, error):
+    try:
+        validators.email(value)
+        return True
+    except errors.InvalidEmailError:
+        error(field, 'not a valid email')