Microsoft Fonts Too Small in Apple Mail

Do HTML messages sent from Windows users look tiny in Apple Mail? Use the following code to trick Apple Mail to display a minimum font size for received messages:

1. Quit Mail
2. Open the Terminal and type in the following:

defaults write com.apple.mail MinimumHTMLFontSize 12

3. Restart Mail.app and your HTML messages are readable.

You’re not limited to “12,” choose a size that’s comfortable for you.