First look

useful/check.py

@@ -0,0 +1,10 @@
+import re
+
+def check_email(email):
+    # Click on Edit and place your email ID to validate
+    #email = "my.ownsite@our-earth.de"
+    valid = re.match(r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$', email)
+    if valid:
+        return True
+    else:
+        return False