If Mail App shows raw HTML data or code for Emails ... That’s because it takes a little more Internet to view the email after properly formatting it as it has to load the required content.

While the process is tedious, encrypting your email address in the HTML code frustrates some of the less sophisticated harvesting programs while giving your human visitors easy access to your inbox.

Also: How to send password-protected emails in Gmail Since the launch of Standard View, Google has retained Gmail's Basic HTML view as an alternative that loads faster and is better suited for ...