Starting with the Mail app version 16.0.11231.20082, you can change the default font for a new mail or replies. The Default font option applies per-account and does not roam to other devices.
To change the default font for the Mail app in Windows 10, do the following.
In Settings, click on Default font.
If you have more than one email account registered in the Windows 10 Mail app, then select the desired account you want to change the default font for, and customize the font using the available options. Check Apply to all accounts to apply the changes to all your email accounts.
The Reset button will restore the font settings back to their defaults.
This entry was posted in Windows 10 and tagged Windows 10 Mail App on February 4, 2019 by Sergey Tkachenko.