XF 1.4 Disable emails globally

Mr Lucky

Well-known member
I want to disable emails from my test forum. If I post a test in a thread that members are watching, I want to avoid them getting a notification that leads them to the test froum which they obviously cannot see as it is in a protected directory.

I have add this to config.php:

$config['enableMail'] = 'false';
But emails are still going out.

Have I got that right, or is there something else I should do?