Android mail app icon

The default email app icon on Android devices is typically a combination of a letter "e" and an envelope. This icon is used by the Gmail app, which is the default email app on many Android devices.

However, if you're referring to the icon for the Android Email app, which is a built-in app on Android devices, it's a simple envelope icon.

Here are some examples of email app icons on Android devices:

Note that these icons may vary depending on the device and the version of the operating system.