Re: Sometimes, Paper
"if somethings broken with email the sender may not know for days, weeks, if at all, that it wasnt delivered."
You can set email servers to report back on delivery status. Most are set to report back in a scale of days but can be set to hours or even minutes. If the receiving mail server is down, there's no reason the sending server can't inform you in a timely manner. That means all servers in the chain need to be properly configured to deal with time sensitive or mission critical email systems so it doesn't get received by a gateway then "lost" in a virus scanner without some sort of message being passed back up the chain to the original sender. (Of course, spammers can abuse this if not properly set up)