Samsung Mail
Samsung Mail is the default email client on Samsung Galaxy devices. It uses Samsung's own rendering engine, which has good CSS support overall but introduces some unique quirks. It supports <style> blocks and most layout properties, but has inconsistencies with certain modern CSS features.
Pre-installed on all Samsung Galaxy smartphones and tablets, which hold ~20% global smartphone market share. A significant mobile email client, particularly in emerging markets.
CSS coverage profile for Samsung Mail
Samsung Mail renders with the Samsung engine and supports 208 of 251 tracked CSS and HTML features fully, with 20 partially supported and 21 unsupported. That places it in a broad coverage band.
Modern CSS works largely as expected. The cost of supporting this client is low — most production templates need only minor adjustments.
208
Supported
20
Partial
21
Unsupported
251
Total
Key gotchas in Samsung Mail
CSS animationsSupport is inconsistent across Samsung Mail versions. Animations may not play or may render only the final frame.
Custom fonts (@font-face)Support varies by device and Samsung Mail version. Always include a robust system font fallback stack.
Viewport-relative units (vw, vh)Viewport units may reference the webview container rather than the device screen, producing unexpected sizing.
How Samsung Mail renders email
- Samsung Mail's rendering engine is Samsung's own Internet/Browser stack, distinct from Chrome on Android. Behaviour is similar to Blink but with subtle differences — particularly around viewport units and font rendering.
- @media queries are honoured, including prefers-color-scheme, but the breakpoint matching can lag a frame or two during orientation change, occasionally producing transient layout flicker.
- Touch targets and font sizes inherit Samsung's accessibility scaling, which can be more aggressive than stock Android. Use -webkit-text-size-adjust to opt out where precise sizing matters.
- Samsung Mail honours dark mode based on the device theme, but its inversion algorithm is more saturation-aggressive than Apple's, producing punchier colours that may push outside brand guidelines.
Dark mode behaviour in Samsung Mail
Samsung Mail supports dark mode and applies automatic color inversion based on the device's theme setting. The inversion algorithm is less predictable than Apple Mail's — test explicitly with dark mode simulation.
QA checklist for Samsung Mail
- Test on actual Samsung devices when available — emulators don't capture Samsung's specific font rendering nuances.
- Verify high-contrast accessibility modes don't break critical layout decisions.
- Check landscape orientation explicitly; layouts that work in portrait can collapse in landscape on Samsung's tablet form factors.
HTML Elements40
| Feature | Support |
|---|---|
| <abbr> | Supported |
| <acronym> | Supported |
| <address> | Supported |
| <audio> | Supported |
| <base> | Supported |
| <bdi> | Supported |
| <blockquote> | Supported |
| <body> | Supported |
| <code> | Supported |
| <del> | Supported |
| <dfn> | Supported |
| <dialog> | Supported |
| <div> | Supported |
| <form> | Supported |
| <h1> | Supported |
| <hr> | Supported |
| <img> | Supported |
| <link> | Unsupported |
| <marquee> | Supported |
| <meter> | Supported |
| <object> | Partial |
| <p> | Supported |
| <picture> | Supported |
| <pre> | Supported |
| <progress> | Supported |
| <rp> | Supported |
| <rt> | Supported |
| <ruby> | Supported |
| <select> | Supported |
| <small> | Supported |
| <span> | Supported |
| <strike> | Supported |
| <strong> | Supported |
| <style> | Supported |
| <svg> | Supported |
| <table> | Supported |
| <textarea> | Unsupported |
| <ul> | Supported |
| <video> | Partial |
| <wbr> | Supported |
CSS At-Rules5
| Feature | Support |
|---|---|
| @font-face | Supported |
| @import | Unsupported |
| @keyframes | Supported |
| @media | Supported |
| @supports | Supported |
Pseudo-Elements6
| Feature | Support |
|---|---|
| ::after | Supported |
| ::before | Supported |
| ::first-letter | Supported |
| ::first-line | Supported |
| ::marker | Supported |
| ::placeholder | Supported |
Pseudo-Classes & Selectors32
| Feature | Support |
|---|---|
| :adjacent-sibling | Supported |
| :attribute-selector | Supported |
| :chaining | Supported |
| :checked | Supported |
| :child-combinator | Supported |
| :class-selector | Supported |
| :descendant-combinator | Supported |
| :first-child | Supported |
| :first-of-type | Supported |
| :focus | Supported |
| :general-sibling | Supported |
| :grouping | Supported |
| :has | Supported |
| :hover | Supported |
| :id-selector | Supported |
| :lang | Supported |
| :last-child | Supported |
| :last-of-type | Supported |
| :link | Supported |
| :not | Supported |
| :nth-child | Supported |
| :nth-last-child | Supported |
| :nth-of-type | Supported |
| :only-child | Supported |
| :only-of-type | Supported |
| :target | Supported |
| :type-selector | Supported |
| :universal-selector | Supported |
| :visited | Unsupported |
| pseudo-class-active | Unsupported |
| pseudo-class-default | Unknown |
| pseudo-class-nth-last-of-type | Supported |
CSS Functions8
| Feature | Support |
|---|---|
| calc | Supported |
| clamp | Partial |
| conic-gradient | Partial |
| fit-content | Unsupported |
| linear-gradient | Partial |
| max | Partial |
| min | Partial |
| radial-gradient | Supported |
CSS Properties160
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