CSS property · data last changed 10 Nov 2026
resize in email clients
Works in 1 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 13 more. Partial in Apple Mail. Untested in Thunderbird, HEY Mail and Fastmail.
Your reader in Outlook Classic sees the email without resize, 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 resize in Outlook Classic. Design so the email still reads without it.
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resize 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 |
| Apple Mail iOS | Not supported |
| Yahoo Mail | Not supported See caveat 1 |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| Proton Mail | Not supported |
| AOL Mail | Not supported See caveat 1 |
| Superhuman | Not supported |
| Apple Mail | Partial See caveat 2 |
| Thunderbird | Untested |
| HEY Mail | Untested |
| Fastmail | Untested |
| Samsung Mail | Works |
Caveats (2)
- 1. Gmail, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook for Mac, Yahoo Mail, AOL Mail:
resizeproperty is stripped from style tag - 2. Apple Mail: Does not support
inlineandblockvalues
Caveats as recorded by caniemail (MIT), one entry per wording.
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fix
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