Turn off link preview in macOS Mail

Mail.plist

<!--
Save this plist as /Library/Preferences/FeatureFlags/Domain/Mail.plist and reboot. You can opt for terminal command instead:
sudo defaults write /Library/Preferences/FeatureFlags/Domain/Mail.plist RichLinks -dict-add Enabled -bool NO ;
sudo chmod -R o+rX /Library/Preferences/FeatureFlags
-->

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>RichLinks</key>
    <dict>
        <key>Enabled</key>
        <false/>
    </dict>
</dict>
</plist>