CSS Properties

resize

CSS property · 1 supported, 1 partial, 11 unsupported across 15 clients

Client Support

Client	Category	Engine	Support
Gmail	webmail	Gmail Web	Unsupported
Gmail Android	mobile	Gmail Mobile	Unsupported
Gmail iOS	mobile	Gmail Mobile	Unsupported
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
Apple Mail	desktop	WebKit	Partial
Apple Mail iOS	mobile	WebKit	Unsupported
Yahoo Mail	webmail	Yahoo	Unsupported
Samsung Mail	mobile	Samsung	Supported
Thunderbird	desktop	Gecko	Unknown
HEY Mail	webmail	WebKit	Unknown
Superhuman	desktop	Blink	Unsupported

Client-by-client behaviour for resize

Fully supports resize (1): Samsung Mail.

Partial support (1): Apple Mail. Expect rendering quirks unique to each engine — partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

No support (11): Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Apple Mail iOS, Yahoo Mail, Superhuman. Plan fallbacks for these clients before relying on resize in production sends.

Behaviour unverified in: Thunderbird, HEY Mail.