border-spacing in Yahoo Mail
Works border-spacing works in Yahoo Mail.
Works in 17 of 21 · not supported in 2 · 2 untested
Which clients
- Works
- Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Thunderbird, Proton Mail, AOL Mail, Superhuman
- Not supported
- Outlook Classic, Outlook for Mac
- Untested
- HEY Mail, Fastmail
The fix for the clients that need it
Needed in 2 of 21: Outlook Classic and Outlook for Mac.
Use the cellspacing HTML attribute instead of border-spacing CSS
<table cellspacing="8" style="border-collapse: separate;">
<tr><td>Cell</td></tr>
</table>Show the original
<table style="border-spacing: 8px; border-collapse: separate;">
<tr><td>Cell</td></tr>
</table>A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →
What Yahoo Mail does with border-spacing
The Emailens probe for border-spacing on a real install counted as Yahoo Mail, captured 14 Oct 2026. It shows the probe, not the fix. Where border-spacing is supported it shows: 8px gaps between cells.
caniemail: border-spacing works in Yahoo Mail.
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
Every feature in Yahoo Mail · border-spacing in every client
Questions
- How many email clients support border-spacing?
- It works in 17 of 21, not supported in Outlook Classic and Outlook for Mac, 2 untested.
- Does border-spacing work in Yahoo Mail iOS?
- border-spacing works 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 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 20 Dec 2023 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping