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transition in Apple Mail iOS

Works transition works in Apple Mail iOS.

Works in 4 of 21 · partial in 7 · not supported in 10

Which clients
Works
Apple Mail, Apple Mail iOS, Thunderbird, Fastmail
Partial
Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, HEY Mail, AOL Mail, Superhuman
Not supported
Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Proton Mail

The fix for the clients that need it

Needed in 17 of 21: Gmail, Gmail Android, Gmail iOS and 14 more.

Transitions don't work in email; style the default state well

instead 
.button {
  /* Use the most visually appealing state as default.
     :hover is only supported in a few clients. */
  background-color: #6d28d9;
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
}
Show the original
before 
.button {
  background-color: #6d28d9;
  transition: background-color 0.2s;
}
.button:hover {
  background-color: #5b21b6;
}

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Your next question

Every feature in Apple Mail iOS · transition in every client

Questions

How many email clients support transition?
It works in 4 of 21, partial in 7, not supported in 10.
Does transition work in Apple Mail?
transition works in Apple Mail. Closest to Apple Mail iOS: Apple Mail, which agrees on 284 of the 298 features both are tested on.

To see what in your email Apple Mail iOS does not support, paste the whole email.

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caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 29 Mar 2024 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping