This (prettyandsimple+test@example.com) email address is considered valid.<br>This (prettyandsimple@example.com) email address is considered valid.<br>This (very.common@example.com) email address is considered valid.<br>This (disposable.style.email.with+symbol@example.com) email address is considered valid.<br>This (other.email-with-dash@example.com) email address is considered valid.<br>This (x@example.com) email address is considered valid.<br>This ("much.more unusual"@example.com) email address is <strong> NOT </strong> considered valid.<br>This ("very.unusual.@.unusual.com"@example.com) email address is considered valid.<br>This ("very.(),:;<>[]\".VERY.\"very@\ \"very\".unusual"@strange.example.com) email address is considered valid.<br>This (example-indeed@strange-example.com) email address is considered valid.<br>This (admin@mailserver1) email address is <strong> NOT </strong> considered valid.<br>This (#!$%&*+-/=?^_`{}|~@example.org) email address is considered valid.<br>This ("()<>[]:,;@\\"!#$%&*+-/=?^_`{}| ~.a"@example.org) email address is <strong> NOT </strong> considered valid.<br>This (" "@example.org) email address is <strong> NOT </strong> considered valid.<br>This (example@localhost) email address is <strong> NOT </strong> considered valid.<br>This (example@s.solutions) email address is considered valid.<br>This (user@com) email address is <strong> NOT </strong> considered valid.<br>This (user@localserver) email address is <strong> NOT </strong> considered valid.<br>This (user@[IPv6:2001:db8::1]) email address is considered valid.<br>