If you would like to move forward with increasing this limit please take the following steps:
- Have a System Administrator log a Case with Salesforce Support
- Please include all important details including a business case for the request as well as the requested limit change
- Support will review the Case and action it as needed.
Note: When viewing the HTML body of an email users may still see truncation as the limit includes the combined total of the visible contents of the email and the HTML tags included to render the contents.