← CSS Support IndexDoes CSS
Does CSS ID selector Work in HTML Email?
The ID selector (`#id`) allows to apply styles to an element with the corresponding `id` attribute.
Quick Answer
Does ID selector work in HTML email?
The CSS ID 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 ID selector?
CSS support for ID 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
Test Your Email Now
Paste your HTML and see how it renders in clients that don't support ID selector.