How many email clients support display:grid?

It works in 18 of 21, partial in 2, not supported in Outlook Classic.

Does display:grid work in Apple Mail?

display:grid works in Apple Mail. Closest to Fastmail: Apple Mail, which agrees on 192 of the 235 features both are tested on.

display:grid in Fastmail

Works display:grid works in Fastmail.

Works in 18 of 21 · partial in 2 · not supported in 1

Which clients

Works: Gmail, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, AOL Mail, Fastmail, Superhuman
Partial: Gmail Android, Gmail iOS
Not supported: Outlook Classic

The fix for the clients that need it

Needed in 3 of 21: Outlook Classic, Gmail Android and Gmail iOS.

Replace CSS Grid with table layout for email compatibility

after

11 lines

<table role="presentation" width="100%" cellpadding="0"
  cellspacing="0" border="0">
  <tr>
    <td width="50%" style="padding: 8px;" valign="top">
      Item 1
    </td>
    <td width="50%" style="padding: 8px;" valign="top">
      Item 2
    </td>
  </tr>
</table>

Show the original

before

5 lines

<div style="display: grid;
            grid-template-columns: 1fr 1fr; gap: 16px;">
  <div>Item 1</div>
  <div>Item 2</div>
</div>

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Every feature in Fastmail · display:grid in every client

Questions

How many email clients support display:grid?: It works in 18 of 21, partial in 2, not supported in Outlook Classic.
Does display:grid work in Apple Mail?: display:grid works in Apple Mail. Closest to Fastmail: Apple Mail, which agrees on 192 of the 235 features both are tested on.

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Real captures 14 Oct 2026 on 11 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 28 Feb 2019 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping