It is a good idea to include a plain-text version of your message for recipients that cannot (or do not want to) view HTML emails. Direct Mail automatically creates a plain-text alternative for you, but you can override that and create your own. Here's how:
- Go to the Messages tab.
- Select the message you want to edit.
- Choose Message > Content Type > Use Custom Plain-Text Alternative (or click the "A" button at the bottom of the window).
You can preview what your plain-text version will look like using the Preview window. Choose Message > Preview Message from the menu bar, then click the "A" icon in the toolbar.