A number of times recently when I have opened Mail.app I get a message that says something like identity certificate of smtp.me.com cannot be validated. And I clicked continue anyway. Anyhow, over the next day since opening it I created about 10 drafts and was working on them, and didn't particularly notice I wasn't receiving mail. I didn't notice anything was wrong until I finished one of the drafts this morning and sent it. It never sent. The window dissapeared but the message didn't appear in drafts or sent. So I took a look at the Activity window and saw about 15 things it was trying to do and not finishing any of them. I went through all my other drafts and tried saving them manually and they wouldn't save. They kept showing the darkened red close button to show thye hadn't been saved. I went back to Activity and tried hitting the stop sign next to each process, but after doing that I still couldn't save the messages. I guess this was stupid and I wasn't thinking but I thought quitting and reopening might help. So I quit mail and it wouldn't let me quit (quit was grayed out), so I force quit. I reopened mail and that's when I realized something had been wrong since yesterday when I got that security message. I suddenly got 10 e-mails that apparently had been sent to me since yesterday. I looked in my sent and drafts folders and the message I had sent is nowhere. The messages I had created since the security message yesterday are non-existent. And the messages I had edited since the security message have none of the additions I made to them. I went to mobileme support this morning and I was upset at how clueless the person was. He told me he thought my operating system was corrupted. It was a painful exchange. I called AppleCare and they didn't know what to tell me either and it was awkward. I have my MobileMe setting set to save all my mail on the server but is there a chance it could have saved a localized cached version of these message somewhere? I already looked under Library-->Mail, but it just reflects what's in my inbox. Anyone know where localized caches are? Thank you.