Test, validate and match regular expressions
This regex matches basic email addresses with a local part containing alphanumeric characters, dots, and hyphens, followed by an @ symbol, domain name, and a three-letter top-level domain (e.g., .com, .org). It's useful for simple email extraction or validation in text, though it's not RFC-compliant. The pattern works for common email formats but won't catch all valid variations or complex domains.