Regex Editor & Tester

This regex matches a simplified email address format consisting entirely of lowercase letters. It requires a username of 2-20 characters, followed by an '@', a domain name of 2-20 characters, a dot, and a top-level domain of 2-5 characters. The anchors \A and \Z ensure the entire string conforms to this pattern, making it useful for basic validation of lowercase email inputs in forms or data processing.