iCloud Mail has stopped working on all devices including web interface My iCloud email has stopped working on all my devices including the iCloud web interface. I can log in fine, and all other aspects of iCloud are working well. 

I've tried signing in and out on both mac and iPhone, and changed my password to see if that would reset things, but none of it has fixed the problem. My gmail account is functioning just fine, so I don't think it is just an issue with the Mail app either. 

Any ideas what could be causing it? I use iCloud for my main work email so I'm really keen to fix it asap.
There were iCloud Mail issues today and you were probably in the group that was affected.

When issues with any Apple service occur, the first place you should check is Apple's System Status page.

From the screenshot below, you can see they've resolved two issues affecting users with Mail. 

You can try again and see if your problem is resolved.