Hi Thomas
There should be a "text version" frame on the Email Send after the "HTML version" frame. If you click the "A" button in the text version editor, it will auto generate a text version of the email based off of the HTML version. The text version is optional and a recipient would generally only get it if they have their email client set to display all emails as plain text, but spam filters will often check to see if it is present and may be more likely to treat your email as spam if it isn't. http://help.clickdimensions.com/text-version-of-an-email-template/