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Does CSS Class selector Work in HTML Email?
The class selector (`.className`) allows to apply styles to a group of elements with the corresponding `class` attribute.
Quick Answer
Does Class selector work in HTML email?
The CSS Class selector property is supported in all major email clients tested. You can use it with confidence in your HTML emails.
Which Email Clients Support CSS Class selector?
CSS support for Class selector across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✓ Yes | ~ Partial | — |
| Outlook (Windows) | ✓ Yes | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✓ Yes | — |
| Apple Mail | ✓ Yes | ✓ Yes | — |
| Yahoo! Mail | ✓ Yes | ✓ Yes | — |
| Samsung Email | ? | ✓ Yes | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ✗ No | ✓ Yes | — |
| Fastmail | ✓ Yes | ? | — |
Notes
- #1 Partial. Not supported with non Google accounts.
- #2 Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element.
Frequently Asked Questions
Related CSS Properties
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