Send Email - Raw HTML
Send Email - Raw HTML action is very similar to the Send Email action, however there is one very important difference. It is intended for our more advanced users who know the basics of HTML and CSS.
In the Raw HTML action you can use HTML and CSS tags to style your template. The content that you enter in the message field won't be manipulated in any way (no WordPress filters as well i.e.
You can use this action for example if you downloaded an HTML template from Mailchimp or other mailing software or anywhere from the web.