CKEditor how not to cut styles?

Question

PHP

Hi again.
There was a problem, I installed this editor on self-writing, when sending emails it cuts the template, very much, like this:
What can be done with this?

Answer 1

Did you study the documentation?
docs.ckeditor.com/#!/guide/dev_allowed_content_rules
docs.ckeditor.com/#!/guide/dev_disallowed_content