Conditional e-mails based on radio buttons Drupal Webform
Yes, you want to use hook_mail_alter() in a custom module. This will intercept the outgoing email from Drupal and allow you to add programming logic to the process. For example you could:


Load the webform in question and view its results.
alter the to value of the $message to meet your needs.



  'to': The address or addresses the message will be sent to. The
  formatting of this string will be validated with the PHP e-mail
  validation filter.