CSS property · data last changed 10 Nov 2026
flex-wrap in email clients
Works in 13 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 5 more.
Your reader in Outlook Classic sees the email without flex-wrap, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
For bulletproof responsive column wrapping across all clients including Gmail and Outlook Classic, implement the fluid hybrid pattern. Wrap each column in an inline-block container (<div style="display:inline-block; max-width:...">) and sandwich the layout inside conditional MSO table tags (<!--[if mso]><tr><td><![endif]-->). Outlook Classic renders the rigid MSO table grid, while mobile and modern clients wrap the inline blocks naturally.
There is no drop-in fix for flex-wrap in Outlook Classic. Design so the email still reads without it.
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flex-wrap 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 |
| Gmail Android | Not supported |
| Gmail iOS | Not supported |
| Outlook Classic | Not supported |
| Yahoo Mail | Not supported |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| AOL Mail | Not supported |
Works in 13: Outlook 365, Outlook (New), Outlook iOS and 10 more. Show all
| Client | Support |
|---|---|
| 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 |
| HEY Mail | Works |
| Proton Mail | Works |
| Fastmail | Works |
| Superhuman | Works |
How flex-wrap behaves
The flex-wrap property specifies whether flex items are forced onto a single line or can wrap onto multiple lines. In web design, flex-wrap is the foundation of responsive grids. In HTML email, however, flexbox support is severely fragmented: major clients like Gmail and Outlook Classic either strip or completely ignore flex properties, making direct reliance on flex-wrap a common pitfall in production layouts.
- Gmail (Webmail, iOS, and Android) strips display: flex and flex-wrap from CSS rules, causing flex containers to fall back to standard block or inline flow.
- Outlook Classic has zero support for flexbox properties; all child elements stack according to their natural display defaults.
- Apple Mail, Outlook 365, and Thunderbird fully support flex-wrap, matching modern browser rendering.
Questions
Does flex-wrap work in Gmail?
No. Gmail strips display: flex and flex-wrap across its webmail interface and mobile applications. Flex children will collapse or stack according to default flow.
How do I create wrapping columns in Outlook Classic?
Outlook Classic uses Microsoft Word to render HTML and ignores all flexbox properties. Use conditional MSO comments (<!--[if mso]>) to provide a standard table row and cell layout for Outlook while allowing modern clients to wrap fluidly.
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