I know how to add source code in TinyMCE. And TinyMCE breaks my code after adding it.. It doesn't cut it, but breaks it in another ways like removing some tags in my code etc.
I also know how to change editor, that was what I described in my previous post. I installed and tried another editor but it still cuts off my code after saving.
I tried to add my code to an article with other editors than TinyMCE, And it works perfectly. So it's not about the editor. It's something with Breezingforms Mail back that sets some type of maximum limit.
UPDATE: in #__facileforms_forms -> click on Stucture, and :
email_custom_template -> type: longtext
mb_email_custom_template -> type: longtext
If you click on Change then you can change type