When adding a superscript for items like © or ®, the email editor displays the superscript correctly but when the email is received, a space is added between the descriptive word and the superscript.
Open the editor and edit the HTML in the WYSIWYG editor. Change your <div> tags to <p> tags in the html code. Send yourself another sample email to confirm the space is removed.
Be sure to review these changes with your developer to ensure no unintended changes occur due to this change.