word-break in Outlook Classic
Not supported word-break is not supported in Outlook Classic.
Works in 4 of 21 · partial in 12 · not supported in 5
Which clients
- Works
- Gmail, Thunderbird, Fastmail, Superhuman
- Partial
- Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, HEY Mail, Proton Mail
- Not supported
- Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail
Your reader in Outlook Classic sees the email without word-break, even if it looks right where you tested it.
The fix for Outlook Classic
Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert ​ in a cell that has a width
<table role="presentation" width="100%" cellpadding="0"
cellspacing="0" border="0">
<tr>
<td width="100%">
https://example.com/​very/​long/​url?token=​abc123def456
</td>
</tr>
</table>Show the original
<span style="word-break: break-all;">
https://example.com/very/long/url?token=abc123def456
</span>The checker needs a computer screen.
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What Outlook Classic does with word-break
The Emailens probe for word-break on 3 real installs counted as Outlook Classic, captured 14 Oct 2026. It shows the problem, not the fix. Where word-break is supported it shows: long word wraps inside the box.
caniemail: word-break is not supported in Outlook Classic.
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@emailens/engine 0.18.22 on the original code
Outlook Classic does not support "word-break".
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fix
Every feature in Outlook Classic · word-break in every client
Questions
- How many email clients support word-break?
- It works in 4 of 21, partial in 12, not supported in 5.
- What do I use instead of word-break in Outlook Classic?
- Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert ​ in a cell that has a width.
- Does word-break work in AOL Mail?
- word-break is not supported 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.
No signup · Five clients free, Outlook Classic included · All 21 with an account
The checker needs a computer screen.
Real captures 14 Oct 2026 on 10 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 15 Feb 2022 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping