HTML Elements

<ul>

HTML element · 7 supported, 13 partial, 0 unsupported across 21 clients

As of Sep 2, 2026, <ul> fails or degrades in 14 of 21 email clients, treat it as progressive enhancement, never structure.

3/7 webmail, 2/6 desktop, 2/8 mobile clients support <ul> fully.
Partial in Gmail, Gmail Android, Gmail iOS, Outlook 365 and 9 more, behavior differs from browsers, test before relying on it.
Outlook Classic (Word engine, supported to at least 2029) does not fully support <ul>, 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 Feb 17, 2024, synced by Emailens Sep 2, 2026.

The <ul> element marks an unordered list. Bullets and indentation defaults vary significantly across clients, which makes <ul> one of the more inconsistent layout primitives in email. Some templates reset list styles entirely and rebuild bullet visuals using HTML entities or images for full control.

Client Support

Client	Category	Engine	Support
Gmail	webmail	Gmail Web	Partial^{See caveat 1}
Gmail Android	mobile	Gmail Mobile	Partial^{See caveat 1}
Gmail iOS	mobile	Gmail Mobile	Partial^{See caveat 1}
Outlook 365	webmail	Outlook Web	Partial^{See caveat 1}
Outlook (New)	desktop	Outlook Web	Partial^{See caveat 2}
Outlook Classic	desktop	Microsoft Word	Partial^{See caveat 2}
Outlook iOS	mobile	Outlook Mobile	Partial^{See caveat 1}
Outlook Android	mobile	Outlook Mobile	Partial^{See caveat 1}
Outlook for Mac	desktop	WebKit	Partial^{See caveat 1}
Apple Mail	desktop	WebKit	Supported
Apple Mail iOS	mobile	WebKit	Supported
Yahoo Mail	webmail	Yahoo	Partial^{See caveat 1}
Yahoo Mail Android	mobile	Yahoo	Partial^{See caveat 1}
Yahoo Mail iOS	mobile	Yahoo	Partial^{See caveat 1}
Samsung Mail	mobile	Samsung	Supported
Thunderbird	desktop	Gecko	Supported
HEY Mail	webmail	WebKit	Supported
Proton Mail	webmail	Proton	Supported
AOL Mail	webmail	AOL	Partial^{See caveat 1}
Fastmail	webmail	Fastmail	Supported
Superhuman	desktop	Blink	Unknown

Documented caveats (2)

1.Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail: Partial. The reversed attribute on <ol> is not supported.
2.Outlook (New), Outlook Classic: Partial. The reversed attribute on <ol> is not supported. Partial. Setting the value attribute to an <li> within an <ol> results in a different behaviour in comparison to browsers. The <ol> tag is closed before the <li value="">. A new <ol> is added with the start attribute on it set to the value of the value attribute of the <li>.

Caveats recorded by caniemail.com (MIT) and carried verbatim, one entry per wording rather than per client.

Client-by-client behaviour for <ul>

Fully supports <ul> (7): Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Fastmail.

Partial support (13): Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail. Expect rendering quirks unique to each engine. Partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

Behaviour unverified in: Superhuman.

When to use <ul> in email

Feature lists in product launch emails.
Onboarding checklists in lifecycle drip campaigns.
Bulleted summaries in digest-style content.

Rendering behaviour and edge cases

Default list-style-position and padding-left vary between clients , Outlook indents differently than Gmail.
Some clients strip the bullet entirely if list-style is set to none on the <ul> but not on <li>.
Mobile clients sometimes reduce the indent significantly, causing list items to wrap closer to the bullet than intended.

Recommended fallback strategy

Reset padding-left and margin on both <ul> and <li> inline. For pixel-perfect bullets, replace the default marker with an <img> or styled <span> inside each list item.