Images not displayed, multiple issues

Images are coded by ckeditor this way
(the Base64 string)

The same image in Outlook by pasting the original ckeditor html in the message:

Same process in Gmail

Th problem with linking instead of embedding images doesn't work, and images are private

I found a solution regarding CKeditor embedded images
The module "Image form Word" creates and links a file when pasting an image - not only from Word!
https://www.drupal.org/project/image_from_word/issues/3384105 💬 Module name is misleading : it does much more - Thanks! Active

Remains the irrelevance of the specific Rules action.

The "Send HTML e-mail" action in Mime Mail supports features that only Mime Mail has, like multipart messages (Text&HTML).