why is there an image https://..../wp-content/plugins/ws-form/public/images/email/p.gif added at the end of en e-mail? The e-mail will be seen as SPAM because of that.
This was added to address a bug with Mac Mail in dark mode which would flip email colors if no images were present which in turn affected the presentation of the emails.
We’ve never had any issues with this being picked up as a tracking pixel. At present this cannot be removed unless you disable the ‘Wrap Message in Header and Footer?’ setting in the ‘Send Email’ action and compose your own custom header and footer in the content of the email.