box-shadow in Outlook Classic
Not supported box-shadow is not supported in Outlook Classic.
Works in 14 of 21 · partial in 2 · not supported in 5
Which clients
- Works
- Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail, Superhuman
- Partial
- Gmail Android, Gmail iOS
- Not supported
- Gmail, Outlook Classic, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail
Your reader in Outlook Classic sees the email without box-shadow, even if it looks right where you tested it.
What to do instead in Outlook Classic
Use border as a fallback for box-shadow
.card {
border: 1px solid #e0e0e0;
/* box-shadow as progressive enhancement */
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}Show the original
.card {
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
What Outlook Classic does with box-shadow
The Emailens probe for box-shadow on 3 real installs counted as Outlook Classic, captured 14 Oct 2026. It shows the problem, not the fix. Where box-shadow is supported it shows: box with a red shadow.
caniemail: box-shadow is not supported in Outlook Classic.
Every account includes one free real-device check in classic Outlook, Outlook for Mac and Apple Mail, after you verify your email and run one preview, while this month's free capacity lasts. How real-device checks work →
@emailens/engine 0.18.22 on the original code
Outlook Classic does not support "box-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?
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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?
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fix - Does visibility work in Outlook Classic?
Works in 13 of 21 · not supported in 8
fix
Every feature in Outlook Classic · box-shadow in every client
Questions
- How many email clients support box-shadow?
- It works in 14 of 21, partial in 2, not supported in 5.
- What do I use instead of box-shadow in Outlook Classic?
- Use border as a fallback for box-shadow.
- Does box-shadow work in AOL Mail?
- box-shadow is not supported 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 20 Dec 2023 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping