← CSS Support IndexDoes CSS
Does CSS shape-margin Work in HTML Email?
Sets a margin for a CSS shape created using `shape-outside`
Quick Answer
Does shape-margin work in HTML email?
The CSS shape-margin property is supported in Outlook (Mac / Web), Apple Mail, Samsung Email, Thunderbird. It is NOT supported in Gmail, Outlook (Windows), Yahoo! Mail. Always include a safe fallback for unsupported clients.
Which Email Clients Support CSS shape-margin?
CSS support for shape-margin across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✗ No | ✗ No | — |
| Outlook (Windows) | ✗ No | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✗ No | — |
| Apple Mail | ✓ Yes | ✓ Yes | — |
| Yahoo! Mail | ✗ No | ✗ No | — |
| Samsung Email | ? | ✓ Yes | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ? | ? | — |
| Fastmail | ? | ? | — |
Frequently Asked Questions
Test Your Email Now
Paste your HTML and see how it renders in clients that don't support shape-margin.
Building a new email instead of checking an existing one? MailViewr's Email Builder only lets you use CSS that's known to render across clients, so shape-margin can't sneak into your markup by accident. Open the Email Builder →