Recently this HTML code has started appearing at the bottom of all text boxes. It doesn't appear while composing the email, but does show up in Preview and sent emails.
Thank you for bringing this to our attention. It looks like this may be caused by an extension on our browser. Can you please try going into incognito mode first, then making a copy of the email, and sending yourself a test of that copy to see if the code still appears to troubleshoot? Thank you!