[jiaweihli]

No, disabling images breaks pixel tracking. One way to quickly sanity check a mail client's priorities is whether it gives you the option to disable images by default.

Some clients that don't allow you to disable by default: Polymail, Gmail on iOS, Inbox (Google) on IOS

If it's free, you're the product...

[jkn]

Ha I thought you were wrong, but it turns out that indeed, you can disable image loading in the Gmail Web interface, in the Android app, but not on iOS: https://support.google.com/mail/answer/145919?co=GENIE.Platf...