overflow in Yahoo Mail
Partial overflow is partly supported in Yahoo Mail.
overflow-block & overflow-inline not supported.
Works in 4 of 21 · partial in 16 · not supported in 1
Which clients
- Works
- Thunderbird, HEY Mail, Fastmail, Superhuman
- Partial
- 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, Proton Mail, AOL Mail
- Not supported
- Outlook Classic
Your reader in Yahoo Mail may not see overflow the way you wrote it, even if it looks right where you tested it.
What to do instead in Yahoo Mail
Content will always be visible; design for full content display
<!-- Show full content, or truncate server-side -->
<div style="max-height: 200px;">
Shortened content that fits...
<a href="https://example.com/full">Read more</a>
</div>Show the original
<div style="max-height: 200px; overflow: hidden;">
Long content that gets clipped...
</div>A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
What Yahoo Mail does with overflow
The Emailens probe for overflow on a real install counted as Yahoo Mail, captured 14 Oct 2026. It shows the problem, not the fix. Where overflow is supported it shows: only one line shows.
caniemail: overflow is partly supported in Yahoo Mail.
Partial. overflow-block & overflow-inline not supported.
caniemail record, tested upstream 27 May 2025
- Partial.
overflow-block&overflow-inlinenot supported.
Your next question
- Does box-sizing work in Yahoo Mail?
Works in 16 of 21 · not supported in 5
fix - Does visibility work in Yahoo Mail?
Works in 13 of 21 · not supported in 8
fix - Does text-shadow work in Yahoo Mail?
Works in 12 of 21 · not supported in 9
fix - Does animation work in Yahoo Mail?
Works in 5 of 21 · partial in 1 · not supported in 15
fix - Does word-break work in Yahoo Mail?
Works in 4 of 21 · partial in 12 · not supported in 5
fix - Does gap work in Yahoo Mail?
Works in 7 of 21 · partial in 9 · not supported in 5
fix
Questions
- How many email clients support overflow?
- It works in 4 of 21, partial in 16, not supported in Outlook Classic.
- What do I use instead of overflow in Yahoo Mail?
- Content will always be visible; design for full content display.
- Does overflow work in Yahoo Mail iOS?
- overflow is partly supported in Yahoo Mail iOS. Closest to Yahoo Mail: Yahoo Mail iOS, which agrees on 282 of the 298 features both are tested on.
To see what else in your email Yahoo Mail does not support, paste the whole email.
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Real captures 14 Oct 2026 on 10 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 27 May 2025 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping