<?php $x = "^(([a-zA-Z0-9!#$%&'*+\-/=?^_`{|}~]+)(\.[a-zA-Z0-9!#$%&'*+\-/=?^_`{|}~]+)*@([a-zA-Z0-9\-]+)(\.[a-zA-Z]*)?)$"; var_dump(preg_match($x, 'emiliaborrelli82@gmail.com'));
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