Test, validate and match regular expressions
This regular expression rigorously validates an email address format by ensuring the local and domain parts adhere to standard conventions. It allows specific special characters in the local part (before the @) and requires the domain to consist of dot-separated alphanumeric segments that may include hyphens. The use of start and end of string anchors ensures that the entire string is validated from start to finish, preventing partial matches. It is ideal for strictly validating user input in web forms or data processing pipelines.