https://www.emailonacid.com/blog/article/email-development/best-font-for-email-everything-you-need-to-know-about-email-safe-fonts/
Email Safe Fonts vs. Custom Fonts: What You Need to Know
Learn the best font for email use, all about email-safe or web-safe fonts, and how to use a custom font in your email campaigns.
what you needsafe fontsemailvscustom
https://wpfullpicture.com/module/safe-fonts/
Safe Fonts integration for WordPress • WP Full Picture
safe fontsfor wordpressintegrationwpfull