Email 2.0 Variables Not Shown in Text-Only Emails
Issue
When you add variables to your email template assets, the value assigned to that variable is not showing in the text-only version of the email even though it shows in the HTML version.
Solution
Email 2.0 variables do not pass the defined values for variables through to the text-only email. Since Marketo token values are passed through to the text-only email, customers may expect variable values to also be passed through to text-only emails. However, this is not currently the case.