How many email clients support text-shadow?

It works in 12 of 21, not supported in 9.

Does text-shadow work in Yahoo Mail Android?

text-shadow is not supported in Yahoo Mail Android. Closest to Yahoo Mail iOS: Yahoo Mail Android, which agrees on 284 of the 297 features both are tested on.

text-shadow in Yahoo Mail iOS

Works text-shadow works in Yahoo Mail iOS.

Works in 12 of 21 · not supported in 9

Which clients

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

The fix for the clients that need it

Needed in 9 of 21: Gmail, Gmail Android, Gmail iOS and 6 more.

Use font-weight or border-bottom as alternatives to text-shadow

instead

6 lines

.glow {
  /* text-shadow is not supported in Gmail, Outlook, Yahoo.
     Use font-weight or letter-spacing for emphasis instead. */
  font-weight: bold;
  letter-spacing: 0.5px;
}

Show the original

before

3 lines

.glow {
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

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Your next question

Every feature in Yahoo Mail iOS · text-shadow in every client

Questions

How many email clients support text-shadow?: It works in 12 of 21, not supported in 9.
Does text-shadow work in Yahoo Mail Android?: text-shadow is not supported in Yahoo Mail Android. Closest to Yahoo Mail iOS: Yahoo Mail Android, which agrees on 284 of the 297 features both are tested on.

To see what in your email Yahoo Mail iOS does not support, paste the whole email.

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Real captures 14 Oct 2026 on 11 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 28 Feb 2019 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping