text-decoration

Client-by-client behaviour for text-decoration

Fully supports text-decoration (11): Gmail, Outlook 365, Outlook iOS, Outlook Android, Apple Mail, Apple Mail iOS, Yahoo Mail, Samsung Mail, Thunderbird, HEY Mail, Superhuman.

Partial support (4): Gmail Android, Gmail iOS, Outlook (New), Outlook Classic. Expect rendering quirks unique to each engine — partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

When to use text-decoration in email

• Removing underlines from CTA button anchors that are styled as buttons.
• Strikethrough pricing in promotional emails (`text-decoration: line-through`).
• Adding hover underline on web-mode email previews where pseudo-classes are honored.

Rendering behaviour and edge cases

• Outlook on Windows applies a default underline to all <a> elements; you must declare text-decoration: none AND override the link color to fully un-style.
• Apple Mail respects text-decoration but adds a phone-number / address link auto-underline that overrides yours — wrap such content in <a style="text-decoration:none;color:inherit"> to defeat it.
• Yahoo Mail strips text-decoration from non-anchor elements in some sanitizer paths.

Recommended fallback strategy

When un-styling links, set text-decoration: none, color, and an explicit display: inline-block on the anchor for maximum coverage. For automatically-detected links (phones, addresses), wrap them yourself in styled anchor tags.

Fixes & Workarounds