text-shadow in Outlook Classic
Not supported text-shadow is not supported in Outlook Classic.
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
Your reader in Outlook Classic sees the email without text-shadow, even if it looks right where you tested it.
The fix for Outlook Classic
Use font-weight or border-bottom as alternatives to text-shadow
.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
.glow {
text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}The checker needs a computer screen.
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What Outlook Classic does with text-shadow
The Emailens probe for text-shadow on 3 real installs counted as Outlook Classic, captured 14 Oct 2026. It shows the problem, not the fix. Where text-shadow is supported it shows: text with a red shadow.
caniemail: text-shadow is not supported in Outlook Classic.
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@emailens/engine 0.18.22 on the original code
Outlook Classic does not support "text-shadow".
Your next question
- Does word-break work in Outlook Classic?
Works in 4 of 21 · partial in 12 · not supported in 5
fix - Does display:flex work in Outlook Classic?
Works in 18 of 21 · partial in 2 · not supported in 1
fix - Does display:grid work in Outlook Classic?
Works in 18 of 21 · partial in 2 · not supported in 1
fix - Does border-spacing work in Outlook Classic?
Works in 17 of 21 · not supported in 2 · 2 untested
fix - Does border-radius work in Outlook Classic?
Works in 16 of 21 · partial in 4 · not supported in 1
fix - Does visibility work in Outlook Classic?
Works in 13 of 21 · not supported in 8
fix
Every feature in Outlook Classic · text-shadow in every client
Questions
- How many email clients support text-shadow?
- It works in 12 of 21, not supported in 9.
- What do I use instead of text-shadow in Outlook Classic?
- Use font-weight or border-bottom as alternatives to text-shadow.
- Does text-shadow work in AOL Mail?
- text-shadow works in AOL Mail. Closest to Outlook Classic: AOL Mail, which agrees on 206 of the 298 features both are tested on.
To see what else in your email Outlook Classic does not support, paste the whole email.
No signup · Five clients free, Outlook Classic included · All 21 with an account
The checker needs a computer screen.
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