bimi
CSS property · 9 supported, 0 partial, 11 unsupported across 21 clients
9 of 21 email clients render bimi fully (Sep 2, 2026 data); it breaks outright in Outlook 365, Outlook (New), Outlook Classic and 8 more.
- 3/7 webmail, 1/6 desktop, 5/8 mobile clients support bimi fully.
- Unsupported in Outlook 365, Outlook (New), Outlook Classic, Outlook iOS and 7 more.
- Outlook Classic (Word engine, supported to at least 2029) does not fully support bimi, and its replacement changes little here; see the deprecation diff.
- Across all clients, only 6 of 298 tracked HTML/CSS features render identically everywhere.
Source: caniemail.com (MIT), via the Emailens engine. Last tested upstream Dec 29, 2022, synced by Emailens Sep 2, 2026.
Client Support
| Client | Category | Engine | Support |
|---|---|---|---|
| Gmail | webmail | Gmail Web | Supported |
| Gmail Android | mobile | Gmail Mobile | Supported |
| Gmail iOS | mobile | Gmail Mobile | Supported |
| Outlook 365 | webmail | Outlook Web | Unsupported |
| Outlook (New) | desktop | Outlook Web | Unsupported |
| Outlook Classic | desktop | Microsoft Word | Unsupported |
| Outlook iOS | mobile | Outlook Mobile | Unsupported |
| Outlook Android | mobile | Outlook Mobile | Unsupported |
| Outlook for Mac | desktop | WebKit | Unsupported |
| Apple Mail | desktop | WebKit | Supported |
| Apple Mail iOS | mobile | WebKit | Supported |
| Yahoo Mail | webmail | Yahoo | Supported |
| Yahoo Mail Android | mobile | Yahoo | Supported |
| Yahoo Mail iOS | mobile | Yahoo | Supported |
| Samsung Mail | mobile | Samsung | Unsupported |
| Thunderbird | desktop | Gecko | Unsupported |
| HEY Mail | webmail | WebKit | Unsupported |
| Proton Mail | webmail | Proton | Unsupported |
| AOL Mail | webmail | AOL | Unsupported |
| Fastmail | webmail | Fastmail | Supported |
| Superhuman | desktop | Blink | Unknown |
Client-by-client behaviour for bimi
Fully supports bimi (9): Gmail, Gmail Android, Gmail iOS, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Fastmail.
No support (11): Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, AOL Mail. Plan fallbacks for these clients before relying on bimi in production sends.
Behaviour unverified in: Superhuman.
Fixes & Workarounds
Outlook 365
Unsupported"bimi" is not supported in this email client.
Outlook (New)
Unsupported"bimi" is not supported in this email client.
Outlook Classic
Unsupported"bimi" is not supported in this email client.
Outlook iOS
Unsupported"bimi" is not supported in this email client.
Outlook Android
Unsupported"bimi" is not supported in this email client.
Outlook for Mac
Unsupported"bimi" is not supported in this email client.
Samsung Mail
Unsupported"bimi" is not supported in this email client.
Thunderbird
Unsupported"bimi" is not supported in this email client.
HEY Mail
Unsupported"bimi" is not supported in this email client.
Proton Mail
Unsupported"bimi" is not supported in this email client.
AOL Mail
Unsupported"bimi" is not supported in this email client.
Related Features
Check your own HTML for bimi
Paste your own, or run the sample below. Analyzed in this page, with no signup and nothing stored.
Test your bimi layout across 21 email clients
Preview rendering, catch CSS issues, and see how bimi displays across Outlook, Gmail, and Apple Mail. Free, no account needed.
Instant live preview · No signup required · 21 email engines
Last tested upstream: · Last synced by Emailens:
caniemail.com (MIT) records Dec 29, 2022 as the last time bimi was tested in a real client, 3 years before this sync. Syncing copies that result forward, it does not re-test it. Carried in @emailens/engine data v0.12.2.