Comment by tambourine_man

I only ever use Gmail's backend. I've been using it for years with Mail.app on both Mac and iOS. Every time I load the web interface I'm appalled.

Not that Mail.app is amazing. It sometimes corrupts its sqlite db (I have 300k+ emails dating back to the late 90s). But it's still way better than the dreadful web interface that only seems to get worse and slower.