Here i am sharing a regex to validate the Email.

This is an standard version of regex.

^([a-zA-Z0-9\!\#\$\%\&\'\*\+\/\=\?\^\_\`\{\|\}\~\-]+)(?:\.[A-Za-z0-9\!\#\$\%\&\'\*\+\/\=\?\^\_\`\{\|\}\~\-]+)*@([a-zA-Z0-9]([\-]?[a-zA-Z0-9]+)*\.)+([a-zA-Z0-9]{0,6})\$

It can validate email like

Valid Emails

arungupta@gmail.com
arun+gupta+ramjiki+@gmail.com
a.little.lengthy.but.fine@dept.example.com
disposable.style.email.with+symbol@example.com
other.email-with-dash@example.com
arun@daiict.ac.in
arun_gupta@gmail.com

Invalid Emails

me@
@example.com
me.@example.com
.me@example.com
me@example..com
me.example@com
me\@example.com