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@media in Thunderbird

Not supported @media is not supported in Thunderbird.

Works in 5 of 21 · partial in 14 · not supported in 2

Which clients
Works
Apple Mail, Apple Mail iOS, HEY Mail, Fastmail, Superhuman
Partial
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, Proton Mail, AOL Mail
Not supported
Outlook Classic, Thunderbird

What to do instead in Thunderbird

Design mobile-first for clients without media query support

instead
<!-- Single-column layout that works without @media -->
<table role="presentation" width="100%"
  style="max-width: 600px;" cellpadding="0"
  cellspacing="0" border="0">
  <tr>
    <td style="padding: 16px;">Left Column</td>
  </tr>
  <tr>
    <td style="padding: 16px;">Right Column</td>
  </tr>
</table>
Show the original
before
<table width="800">
  <tr>
    <td width="400">Left Column</td>
    <td width="400">Right Column</td>
  </tr>
</table>
<style>
  @media (max-width: 600px) {
    table { width: 100% !important; }
    td { display: block !important; width: 100% !important; }
  }
</style>

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Your next question

Every feature in Thunderbird · @media in every client

Questions

How many email clients support @media?
It works in 5 of 21, partial in 14, not supported in Outlook Classic and Thunderbird.
What do I use instead of @media in Thunderbird?
Design mobile-first for clients without media query support.
Does @media work in Apple Mail?
@media 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.

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caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 13 Dec 2023 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping