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@font-face in AOL Mail

Not supported @font-face is not supported in AOL Mail.

Works in 6 of 21 · not supported in 15

Which clients
Works
Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Superhuman
Not supported
Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Proton Mail, AOL Mail, Fastmail

Your reader in AOL Mail sees the email without @font-face, even if it looks right where you tested it.

What to do instead in AOL Mail

Add web-safe font fallback stack

instead
/* Keep @font-face for clients that support it */
@font-face {
  font-family: 'CustomFont';
  src: url('custom.woff2') format('woff2');
}
h1 {
  font-family: 'CustomFont', Arial, Helvetica, sans-serif;
}
Show the original
before
@font-face {
  font-family: 'CustomFont';
  src: url('custom.woff2') format('woff2');
}
h1 { font-family: 'CustomFont'; }

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What AOL Mail does with @font-face

@emailens/engine 0.18.22 on the original code

AOL Mail does not support "@font-face".

Your next question

Every feature in AOL Mail · @font-face in every client

Questions

How many email clients support @font-face?
It works in 6 of 21, not supported in 15.
What do I use instead of @font-face in AOL Mail?
Add web-safe font fallback stack.
Does @font-face work in Yahoo Mail Android?
@font-face is not supported in Yahoo Mail Android. Closest to AOL Mail: Yahoo Mail Android, which agrees on 281 of the 297 features both are tested on.

To see what else in your email AOL Mail does not support, paste the whole email.

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caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 19 Dec 2023 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping