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min-width in Outlook Classic

Not supported min-width is not supported in Outlook Classic.

Works in 20 of 21 · not supported in 1

Which clients
Works
Gmail, Gmail Android, Gmail iOS, 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
Not supported
Outlook Classic

Your reader in Outlook Classic sees the email without min-width, even if it looks right where you tested it.

What to do instead in Outlook Classic

Use a fixed width instead of min-width for Outlook compatibility

instead
<!-- Outlook ignores min-width. Use a fixed width or a spacer. -->
<td width="200" style="width: 200px;">Content</td>
Show the original
before
<td style="min-width: 200px;">Content</td>

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What Outlook Classic does with min-width

The Emailens probe for min-width on 3 real installs counted as Outlook Classic, captured 14 Oct 2026. It shows the problem, not the fix. Where min-width is supported it shows: bar is at least 300px.

Every account includes one free real-device check in classic Outlook, Outlook for Mac and Apple Mail, after you verify your email and run one preview, while this month's free capacity lasts. How real-device checks work →

Your next question

Every feature in Outlook Classic · min-width in every client

Questions

How many email clients support min-width?
It works in 20 of 21, not supported in Outlook Classic.
What do I use instead of min-width in Outlook Classic?
Use a fixed width instead of min-width for Outlook compatibility.
Does min-width work in AOL Mail?
min-width works in AOL Mail. Closest to Outlook Classic: AOL Mail, which agrees on 206 of the 298 features both are tested on.

To see what else in your email Outlook Classic does not support, paste the whole email.

The checker needs a computer screen.

Real captures 14 Oct 2026 on 11 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 29 Nov 2021 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping