CSS property · data last changed 10 Nov 2026
word-spacing in email clients
Works in 14 of 21. Not supported in Outlook Classic and AOL Mail. Partial in Yahoo Mail, Yahoo Mail Android and Yahoo Mail iOS. Untested in HEY Mail and Fastmail.
Your reader in Outlook Classic sees the email without word-spacing, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
There is no drop-in fix for word-spacing in Outlook Classic. Design so the email still reads without it.
No signup · Five clients free, Outlook Classic included · All 21 with an account
The checker needs a computer screen.
A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
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 →
word-spacing is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Outlook Classic | Not supported |
| AOL Mail | Not supported |
| Yahoo Mail | Partial See caveat 1 |
| Yahoo Mail Android | Partial See caveat 1 |
| Yahoo Mail iOS | Partial See caveat 1 |
| HEY Mail | Untested |
| Fastmail | Untested |
Works in 14: Gmail, Gmail Android, Gmail iOS and 11 more. Show all
| Client | Support |
|---|---|
| Gmail | Works |
| Gmail Android | Works |
| Gmail iOS | Works |
| Outlook 365 | Works |
| Outlook (New) | Works |
| Outlook iOS | Works |
| Outlook Android | Works |
| Outlook for Mac | Works |
| Apple Mail | Works |
| Apple Mail iOS | Works |
| Samsung Mail | Works |
| Thunderbird | Works |
| Proton Mail | Works |
| Superhuman | Works |
Caveats (1)
- 1. Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS: Does not support
remandchvalues.
Caveats as recorded by caniemail (MIT), one entry per wording.
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 · All email CSS features · What real installs show
Paste your email
Get new email CSS fixes by email.