HTML element · data last changed 10 Nov 2026
<progress> in email clients
Works in 6 of 21. Not supported in Gmail, Gmail iOS, Outlook 365 and 10 more. Partial in Gmail Android. Untested in Superhuman.
Your reader in Outlook Classic sees the email without <progress>, even if it looks right where you tested it.
caniemail (MIT) via @emailens/engine 0.18.22
What to do instead in Outlook Classic
Build the bar as a one-row table: one cell with the filled share as a percentage width and a background color, and one cell for the rest. Write the percentage as text beside the bar, so the value reads even where the colors do not.
There is no drop-in fix for <progress> in Outlook Classic. Design so the email still reads without it.
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<progress> is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Gmail | Not supported |
| Gmail iOS | Not supported |
| Outlook 365 | Not supported |
| Outlook (New) | Not supported |
| Outlook Classic | Not supported |
| Outlook iOS | Not supported |
| Outlook Android | Not supported |
| Outlook for Mac | Not supported |
| Yahoo Mail | Not supported |
| Yahoo Mail Android | Not supported |
| Yahoo Mail iOS | Not supported |
| HEY Mail | Not supported |
| AOL Mail | Not supported |
| Gmail Android | Partial See caveat 1 |
| Superhuman | Untested |
Works in 6: Apple Mail, Apple Mail iOS, Samsung Mail and 3 more. Show all
| Client | Support |
|---|---|
| Apple Mail | Works |
| Apple Mail iOS | Works |
| Samsung Mail | Works |
| Thunderbird | Works |
| Proton Mail | Works |
| Fastmail | Works |
Caveats (1)
- 1. Gmail Android: Partial. Supported with non Google accounts only.
Caveats as recorded by caniemail (MIT), one entry per wording.
How <progress> behaves
<progress> draws a bar only in Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, Proton Mail and Fastmail. Gmail, Yahoo Mail, AOL Mail, HEY Mail and every Outlook do not support it, so most readers get no bar.
- Every Outlook lacks support, Outlook Classic and the newer apps alike, and so do Gmail on the web and Gmail iOS.
- Gmail Android draws <progress> only for non-Google accounts, so a reader on a Gmail address sees no bar there either.
- A bar built from table cells works in every client because tables, background-color and width on cells are supported everywhere. Do not build it from divs: Outlook Classic ignores width on a div.
Questions
Does the <progress> element work in email?
Only in Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, Proton Mail and Fastmail. Gmail, Outlook and Yahoo Mail do not support it. Use a one-row table with percentage widths instead.
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