How can i enable IFRAME tags to TinyMCE?

Hello,
i have spended a lot of hours and still can not find how to enable the iframe tags.

Also, i don’t why but the TinyMCE plugins are not working.

I tried disable of media plugin, I removed the AddNoFilter('iframe, but no results…

Please help

@nick You need to view the source code within the editor to add a iframe element. But many email clients will not display an iframe so it might not be a good idea.

On the Settings page there is a TinyMCE group of settings where you can remove the media plugin from the list of plugins to load.