<link> in Thunderbird
Not supported <link> is not supported in Thunderbird.
Works in 3 of 21 · not supported in 18
Which clients
- Works
- Outlook Classic, Apple Mail, Apple Mail iOS
- Not supported
- Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, AOL Mail, Fastmail, Superhuman
Your reader in Thunderbird sees the email without <link>, even if it looks right where you tested it.
The fix for Thunderbird
Inline all CSS instead of using external stylesheets
<div style="max-width: 600px; margin: 0 auto;">
<div style="background-color: #6d28d9; padding: 32px;"></div>
</div>Show the original
<head>
<link rel="stylesheet" href="styles.css" />
</head>The checker needs a computer screen.
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What Thunderbird does with <link>
@emailens/engine 0.18.22 on the original code
Thunderbird does not support external stylesheets.
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Works in 10 of 21 · not supported in 10 · 1 untested
Questions
- How many email clients support <link>?
- It works in 3 of 21, not supported in 18.
- What do I use instead of <link> in Thunderbird?
- Inline all CSS instead of using external stylesheets.
- Does <link> work in Apple Mail?
- <link> works in Apple Mail. Closest to Thunderbird: Apple Mail, which agrees on 219 of the 261 features both are tested on.
To see what else in your email Thunderbird does not support, paste the whole email.
No signup · Five clients free, Outlook Classic included · All 21 with an account
The checker needs a computer screen.
caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 21 Dec 2023 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping