Email, Messaging, & Video Calls Email Sending a Message in Plain Text With Mac OS X Mail Share Pin Email Print Blake Burkhart / flickr / CC BY 2.0 Email Yahoo! Mail Gmail By Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated January 31, 2020 By default, Mac OS X Mail sends messages using Rich Text Format. This means you can use custom fonts and boldface or insert pictures inline in your emails. The Dangers of Rich Text Using Rich Text Format can also mean that the recipients do not see all this formatting fancy, though, and have to decipher your messages from a lot of funny (strange) characters. This only applies to recipients who only view mail in plain text format. Hardly anyone does this anymore, now that we have broadband ad high-speed internet, but you may run into a few people who use old equipment or live in remote locations who prefer plain text email. Fortunately, this unfortunate situation is easy to avoid in Mac OS X Mail: make sure a message is sent in plain text only — certain to be displayed properly in every email program for every recipient. Send a Message in Plain Text With Mac OS X Mail To send an email using but plain text from Mac OS X Mail: Compose the message as usual in Mac OS X Mail.Before selecting Send, select Format > Make Plain Text from the menu.If you cannot find this menu item (but Format > Make Rich Text instead), your message is already in plain text and you don't need to change anything.If an Alert pops up, select OK. Make Plain Text Your Default If you find you send plain text emails frequently in Mac OS X Mail, you can avoid switching to plain text each time and make it the default instead. To send plain text messages by default in Mac OS X Mail: Select Mail > Preferences from the Mac OS X Mail menu.Go to the Composing category.Make sure Plain Text is selected from the Message Format (or Format) drop-down menu.Close the Composing preferences dialog. Tested with Mac OS X Mail 1.2, Mac OS X Mail 3, and MacOS Mail 10.