Since my curiosity was so great, I went and ran a test with 17 different email clients (amen Litmus App) and, as you might guess, almost none of them support @ font-face. Of all 17 clients, only Apple Mail 3 and Apple Mail 4 really supported it (amen Mac), and AOL Mail took as much time as I did not even bother to wait, a smaller part.
So the conclusion is that if 2020 is shown in the year number indicated on the calendar, don't worry about using @ font-face in your email newsletters, stick with Impact and Georgia.
Ragnar
source share