Below is the solution to disable the “view in web browser” link entirely – so anyone who already received any of emails and later clicks “view in web browser” link would see an error page.

 

For disabling 'view in the webs' link in sent emails follow the below steps:

  1. Log into your instance
  2. Email Setup -> Email Defaults -> Advanced Options -> Saved Email Settings -> Search for the email you want to disable
  3. Select the email and click -> search for deployment
  4. It will give you all email sends for this email
  5. You can disable them correspondingly.

 

See snapshot for more details:

 

I hope this is helpful.