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Does CSS word-spacing Work in HTML Email?
Sets the length of space between words and between tags.
Quick Answer
Does word-spacing work in HTML email?
The CSS word-spacing property is supported in Gmail, Outlook (Mac / Web), Apple Mail, Samsung Email, and others. It is NOT supported in Outlook (Windows). Always include a safe fallback for unsupported clients.
Which Email Clients Support CSS word-spacing?
CSS support for word-spacing across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✓ Yes | ✓ Yes | — |
| Outlook (Windows) | ✗ No | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✓ Yes | — |
| Apple Mail | ✓ Yes | ✓ Yes | — |
| Yahoo! Mail | ~ Partial | ~ Partial | — |
| Samsung Email | ? | ✓ Yes | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ✓ Yes | ✓ Yes | — |
| Fastmail | ? | ? | — |
Notes
- #1 Does not support `rem` and `ch` values.
Frequently Asked Questions
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