Vanished from the face of the earth: An e-mail crisis

As of about half an hour ago, every e-mail that I've sent from my Yahoo blogger e-mail account since March 17 has disappeared from my screen. So, if you should happen to reply to something I've sent, please give me extra time to respond. I'll have to reread what I sent you in the first place, to refresh my memory, before replying.

Update: I've lost everything that I sent between March 17 and literally 10 minutes ago. Go figure.

Update #2: Okay, let me give Yahoo the benefit of the doubt. Here's a lovely item from my e-mail window: "Save Sent Items is ON: [Turn Save Sent Items OFF]". I probably hit the "Turn Save Sent Items OFF" link by accident. Will someone please turn my brain back on? Sigh.