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overflow-wrap in HEY Mail

Untested caniemail has no record for overflow-wrap in HEY Mail.

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

What to do instead in HEY Mail

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

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

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Your next question

Every feature in HEY Mail · 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 HEY Mail?
Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert &#8203; in a cell that has a width.
Does overflow-wrap work in Fastmail?
caniemail has no record for overflow-wrap in Fastmail. Closest to HEY Mail: Fastmail, which agrees on 173 of the 235 features both are tested on.

To see what in your email HEY Mail does not support, paste the whole email.

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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