I’ve written a long rant about how annoying Outlook is when you reply to a message. It’s the blue bar, you see. You delete the entire original message, but it still appears when you type. Or you type after the blue-barred quote, and your typing gets the blue bar too. Or you try to type within the original message – as recommended here – and your typing is hard to distinguish from that of the original.

The rant with some tips and workarounds is here.