Does overflow-wrap work in Outlook (New)?

overflow-wrap is not supported in Outlook (New). Outlook 365 and Outlook (New) differ on 1 feature: text-shadow.

overflow-wrap in Outlook 365

Not supported overflow-wrap is not supported in Outlook 365.

Works in 2 of 21 · partial in 3 · not supported in 13 · 3 untested

Which clients

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

Your reader in Outlook 365 sees the email without overflow-wrap, even if it looks right where you tested it.

The fix for Outlook 365

Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert  in a cell that has a width

after

8 lines

<table role="presentation" width="100%" cellpadding="0"
  cellspacing="0" border="0">
  <tr>
    <td width="100%">
      https://example.com/&#8203;very/&#8203;long/&#8203;url?token=&#8203;abc123def456
    </td>
  </tr>
</table>

Show the original

before

3 lines

<p style="overflow-wrap: break-word;">
  https://example.com/very/long/url?token=abc123def456
</p>

Test this fix, free

Outlook 365 opens with a free account; the checker shows five clients without one.

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What Outlook 365 does with overflow-wrap

@emailens/engine 0.18.22 on the original code

Outlook 365 does not support "overflow-wrap".

Your next question

Every feature in Outlook 365 · overflow-wrap in every client

Questions

How many email clients support overflow-wrap?: It works in 2 of 21, partial in 3, not supported in 13, 3 untested.
What do I use instead of overflow-wrap in Outlook 365?: Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert  in a cell that has a width.
Does overflow-wrap work in Outlook (New)?: overflow-wrap is not supported in Outlook (New). Outlook 365 and Outlook (New) differ on 1 feature: text-shadow.

To see what else in your email Outlook 365 does not support, paste the whole email.

Check your email, free

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 3 Aug 2022 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping