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Does CSS text-underline-position Work in HTML Email?
Specifies the position of the underline which is set using the `text-decoration property`'s underline value.
Quick Answer
Does text-underline-position work in HTML email?
The CSS text-underline-position property is supported in Gmail, Outlook (Mac / Web), Samsung Email, Thunderbird, and others. It is NOT supported in Outlook (Windows), Yahoo! Mail. Always include a safe fallback for unsupported clients.
Which Email Clients Support CSS text-underline-position?
CSS support for text-underline-position across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✓ Yes | ✓ Yes | — |
| Outlook (Windows) | ✗ No | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✓ Yes | — |
| Apple Mail | ~ Partial | ~ Partial | — |
| Yahoo! Mail | ✗ No | ✗ No | — |
| Samsung Email | ? | ✓ Yes | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ✓ Yes | ✓ Yes | — |
| Fastmail | ? | ? | — |
Notes
- #1 Partial. Supports `under` but not `right` and `left`
Frequently Asked Questions
Related CSS Properties
Test Your Email Now
Paste your HTML and see how it renders in clients that don't support text-underline-position.