CSS property · data last changed 10 Nov 2026
user-select in email clients
Works in 3 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 10 more. Partial in Apple Mail iOS and Proton Mail. Untested in Thunderbird, HEY Mail and Fastmail.
Your reader in Outlook Classic sees the email without user-select, 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 user-select in Outlook Classic. Design so the email still reads without it.
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user-select is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Gmail | Not supported See caveat 1 |
| Gmail Android | Not supported |
| Gmail iOS | Not supported See caveat 1 |
| Outlook 365 | Not supported See caveat 1 |
| Outlook (New) | Not supported See caveat 1 |
| Outlook Classic | Not supported |
| Outlook iOS | Not supported See caveat 1 |
| Outlook Android | Not supported |
| Outlook for Mac | Not supported See caveat 1 |
| Yahoo Mail | Not supported See caveat 1 |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| AOL Mail | Not supported See caveat 1 |
| Apple Mail iOS | Partial See caveat 3 |
| Proton Mail | Partial See caveat 4 |
| Thunderbird | Untested |
| HEY Mail | Untested |
| Fastmail | Untested |
| Apple Mail | Works See caveat 2 |
| Samsung Mail | Works |
| Superhuman | Works |
Caveats (4)
- 1. Gmail, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook for Mac, Yahoo Mail, AOL Mail: Property is stripped from style tag
- 2. Apple Mail: Works with
-webkitprefix - 3. Apple Mail iOS: Works with
-webkitprefixallvalue does not work - 4. Proton Mail:
allvalue does not worknonevalue does not work, client allow to select text anyway
Caveats as recorded by caniemail (MIT), one entry per wording.
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