I think AOL used to have this. The problem I had was that suddenly, 'send' was more like 'save as draft', so I'd only get the "I shouldn't have sent that!" vibe

I think AOL used to have this. The problem I had was that suddenly, 'send' was more like 'save as draft', so I'd only get the "I shouldn't have sent that!" vibe when it was already permanently sent.