Could not instantiate mail function

If your Joomla server does not support the php mail() function and Joomla attempts to send an email (such as a new user registration email), any of the following message may appear:

  1. Could not instantiate mail function.
  2. The mail() function has been disabled and the mail cannot be sent.
  3. Registration failed: An error was encountered while sending the registration email. A message has been sent to the administrator of this site.