Regex Tester & Validator

This regex matches email-like strings that start with at least 4 word characters, followed by one or more '@' symbols, then at least 2 word characters, and ending with either '.com' or '.co.uk'. It uses the gm flags so it can match multiple lines. The pattern is simplistic and not a robust email validator; it allows multiple '@' and does not account for dots in the domain name. It is useful for basic filtering or highlighting strings that approximate an email format for specific domains in .NET applications.