[support] Email to Commenter

Hello Drupal Devs, I am searching for a module which can send an email to the commenter commenting on my site. For settings, anonymous commenting enabled, a commenter might not leave his information, and if he does a email should be send thanking him for the comment. Is there any module which does this ? NOTE - I am avoiding custom coding, which might be the last option. -- Regards, Vaibhav Jain