[brown9-2]

You are correct about iOS. On my iPhone 4 with iOS 5.1, with remote images enabled (by default) it leaks 17 out of 32 categories. With remote images disabled, it leaks 0 out of 32 categories.

In contrast, Outlook for Mac 2011 leaks 2 out of 32 categories (audio and video) with remote images disabled. Mail.app 4.5 leaks 14 out of 32 categories with remote images disabled.

[mike-cardwell]

The iPhone used to leak audio and video too, when images were disabled. I bug reported that ages ago and they fixed it after a few months.

Do you intend to file bug reports for Outlook and Mail.app?

EDIT: I just asked somebody who has Mail.app version 5.2 to test with remote images disabled, and it didn't trigger any of the tests.