box-sizing in AOL Mail
Not supported box-sizing is not supported in AOL Mail.
Works in 16 of 21 · not supported in 5
Which clients
- Works
- Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail, Superhuman
- Not supported
- Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail
Your reader in AOL Mail sees the email without box-sizing, even if it looks right where you tested it.
The fix for AOL Mail
Account for padding in width manually (no box-sizing)
<div style="width: 300px;">
<div style="padding: 20px;">
Content; padding on inner element
</div>
</div>Show the original
<div style="width: 300px; padding: 20px;
box-sizing: border-box;">
Content; total width stays 300px
</div>The checker needs a computer screen.
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What AOL Mail does with box-sizing
@emailens/engine 0.18.22 on the original code
AOL Mail does not support "box-sizing".
Your next question
- Does visibility work in AOL Mail?
Works in 13 of 21 · not supported in 8
fix - Does animation work in AOL Mail?
Works in 5 of 21 · partial in 1 · not supported in 15
fix - Does word-break work in AOL Mail?
Works in 4 of 21 · partial in 12 · not supported in 5
fix - Does opacity work in AOL Mail?
Works in 19 of 21 · not supported in 2
fix - Does gap work in AOL Mail?
Works in 7 of 21 · partial in 9 · not supported in 5
fix - Does transform work in AOL Mail?
Works in 7 of 21 · partial in 1 · not supported in 13
fix
Questions
- How many email clients support box-sizing?
- It works in 16 of 21, not supported in 5.
- What do I use instead of box-sizing in AOL Mail?
- Account for padding in width manually (no box-sizing).
- Does box-sizing work in Yahoo Mail Android?
- box-sizing is not supported in Yahoo Mail Android. Closest to AOL Mail: Yahoo Mail Android, which agrees on 281 of the 297 features both are tested on.
To see what else in your email AOL Mail 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 11 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 28 Feb 2019 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping