Validate email with regex having exactlly 3 letters in TLD

Advertisements I want to validate an email in a function with an email that meets the following conditions: A valid email address is of the form username@domain.tld, such that: The username consists of only English characters, numbers, underscores and periods. The domain consists of only English characters or numbers. tld is a three-letter word of… Read More Validate email with regex having exactlly 3 letters in TLD