I have arrived to this page in search for e-mail validation, but none of the examples found here have passed all my tests.
Therefore I decided to write my own regEx, adapting some of the concepts from other answers (standing on shoulders of giants), and it is doing great so far:
^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9][a-zA-Z0-9-]{0,253}\.)*[a-zA-Z0-9][a-zA-Z0-9-]{0,253}\.[a-zA-Z0-9]{2,}$
If you find any issues with that pattern, please let me know.
