How to validate email id using Regex?

Hi All,
Hope doing well,
Sir i am validating one email address which should validate like this.

vikash.kr@sonata-software.com  ----- correct mail address
vikash.kr@sonata-software.com.in --- correct mail address.
vikash.k.r@sonata-software.com ---- incorrct mail address
vikash_k_r@sonata-software.com--- incorrect mail address
vikash_k.r@sonata-software.com --- incorrect mail address
vikash.kr@sonata-software.com.in.in.in.in --- incorrect mail address.

so before @ it should validate either one dot or one underscore
and after @ it should accept two dots only. ...