One thing I really don’t understand why the hack the default Mail font size so tiny. It is like font size 6. After months of using it, I couldn’t take any more because more and more my colleague email coming without right font so Mail switch using default size. After long search, I finally found the solution.
- Close Mail if it’s running
- Open Terminal
- Then type following command:
defaults write com.apple.mail MinimumHTMLFontSize 13 - Start Mail program
That’s it! Problem solved.