Mandatory information about my setup:

Have I searched the tickets before posting? Yes
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: Joomla! 3.3.6 Stable
PHP version: 5.3.10-
MySQL version: 5.5.37
CComment version: CComment PRO 5.0.8
Direct link to the page that shows the issue: http://www.finquesrodes.es/es/feedback-es


Description of my issue:
I want to receive a notification by email when someone posts a comment, but do not receive any mail. Deputy Security screen.
Write comments to other mail not being moderator
When someone writes a comment, it is published automatically, but nobody gets any mail. If I refresh the screen, and the following error message: "Unable to start mail function."
If I go to phpmyadmin from the #__comment_queue table aparasen me messages.
Not to do to activate the mails. I have the desperate client.
That solution?
Greetings and thanks