Is there a way to mark an email so I know the sender has read it?

no. There are programs that do that, but they require everyone use the same program. I know outlook would do this. Inside a controled environment like a company its helpful, but when you start sending mail outside where people use all sorts of email clients, webmail, etc it becomes very unreliable even with programs that do it.

Welcome to the discussions, booyabug.

You can tell Mail to add an extra header to your outgoing messages - but you have to use the terminal to do it, and it will apply to every message you send, and not every receiving program will pay any attention to it. But if you want to try it, see this thread.

AK

Am I missing something here? I've just decided to switch from Eudora to Mail and had, I think the same question. The composing window for Eudora has an RR block that I use occasionally and I'd get a message back that read something to the effect that the message had been opened. I've also received mail with "notify sender" and when I click on that I assume the sender gets a similar message stating I've seen his /her email.

So, Eudora has this capability. Does Mail?