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Does CSS max() Work in HTML Email?
Support for the CSS `max()` function.
Quick Answer
Does max() work in HTML email?
The CSS max() property is supported in Gmail, Outlook (Mac / Web), Apple Mail, Thunderbird, and others. It is NOT supported in Outlook (Windows), Yahoo! Mail, Fastmail. Always include a safe fallback for unsupported clients.
Which Email Clients Support CSS max()?
CSS support for max() across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✓ Yes | ~ Partial | — |
| Outlook (Windows) | ✗ No | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✗ No | — |
| Apple Mail | ✓ Yes | ✓ Yes | — |
| Yahoo! Mail | ✗ No | ✗ No | — |
| Samsung Email | ? | ✗ No | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ✓ Yes | ✓ Yes | — |
| Fastmail | ✗ No | ? | — |
Notes
- #1 Partial. Not supported with non Google accounts.
Frequently Asked Questions
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