Need to solve the email validation by using a Regex pattern, The Regex pattern should solve all the possibilities that are mentioned in the below link.
http://onlinetraining.etestinghub.com/email-validation-test-cases/
Already build 50% of pattern but it is not working for all test cases.
^[a-zA-Z0-9_]+[a-zA-Z0-9+-]+[.]?[a-zA-Z0-9]+@[a-zA-Z0-9]+[.]{1}[^(web)^(.)][a-zA-Z]+[.]?[a-z]?[a-z]?[a-zA-Z0-9]$
My pattern validation is not passing the tester's test cases.