(Why? I like challenges, but I don’t want to drink apple cider vinegar every day.)
Day 3: Add a “view in browser” link! Preferably at the top of the email.
If your email gets clipped by the email client like Gmail or Outlook, or if somebody wants to share the email with someone else, or they want to bookmark it in their browser bookmarks this is how they will do it.
Make it a standard practice to add this link to your email templates. Your customers will thank you by sharing your emails much more!