<abbr>
HTML element · 14 supported, 0 partial, 6 unsupported across 21 clients
14 of 21 email clients render <abbr> fully (Oct 14, 2026 data); it breaks outright in Outlook Classic, Yahoo Mail, Yahoo Mail Android and 3 more.
- 4/7 webmail, 4/6 desktop, 6/8 mobile clients support <abbr> fully.
- Unsupported in Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS and 2 more.
- Outlook Classic (Word engine, supported to at least 2029) does not fully support <abbr>, one of the few features its replacement actually fixes; 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 Sep 13, 2023, synced by Emailens Oct 14, 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 | Supported |
| Outlook (New) | desktop | Outlook Web | Supported |
| Outlook Classic | desktop | Microsoft Word | UnsupportedSee caveat 1 |
| Outlook iOS | mobile | Outlook Mobile | Supported |
| Outlook Android | mobile | Outlook Mobile | Supported |
| Outlook for Mac | desktop | WebKit | Supported |
| Apple Mail | desktop | WebKit | Supported |
| Apple Mail iOS | mobile | WebKit | Supported |
| Yahoo Mail | webmail | Yahoo | Unsupported |
| Yahoo Mail Android | mobile | Yahoo | Unsupported |
| Yahoo Mail iOS | mobile | Yahoo | Unsupported |
| Samsung Mail | mobile | Samsung | Supported |
| Thunderbird | desktop | Gecko | Supported |
| HEY Mail | webmail | WebKit | Unsupported |
| Proton Mail | webmail | Proton | Supported |
| AOL Mail | webmail | AOL | Unsupported |
| Fastmail | webmail | Fastmail | Supported |
| Superhuman | desktop | Blink | Unknown |
Documented caveats (1)
- 1.Outlook Classic: Buggy. Element's content are still kept.
Caveats recorded by caniemail.com (MIT) and carried verbatim, one entry per wording rather than per client.
Client-by-client behaviour for <abbr>
Fully supports <abbr> (14): Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, Proton Mail, Fastmail.
No support (6): Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, HEY Mail, AOL Mail. Plan fallbacks for these clients before relying on <abbr> in production sends.
Behaviour unverified in: Superhuman.
Fixes & Workarounds
Outlook Classic
Unsupported`<abbr>` is not supported in this email client.
Yahoo Mail
Unsupported`<abbr>` is not supported in this email client.
Yahoo Mail Android
Unsupported`<abbr>` is not supported in this email client.
Yahoo Mail iOS
Unsupported`<abbr>` is not supported in this email client.
HEY Mail
Unsupported`<abbr>` is not supported in this email client.
AOL Mail
Unsupported`<abbr>` is not supported in this email client.
Related Features
Check your own HTML for <abbr>
Paste your own, or run the sample below. Analyzed in this page, with no signup and nothing stored.
Test your <abbr> layout across 21 email clients
Preview rendering, catch CSS issues, and see how <abbr> 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 Sep 13, 2023 as the last time <abbr> 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 v0.14.5.