I posted this in another thread earlier, but I see more and more people are having the same problem I was having. Ok, so heres the problem everyone seems to be having: "All my mail is gone!" "Tiger ate all my mail!" "Mail is broken!" "I cant get it to quit!" "I can send mail, but not receive!" "Mail is not working" etc etc etc Ok, I had the exact same problem. I loaded mail, and low and behold, there was no mail, and it wouldnt receive any more. So I opened up the console, and noticed a whole slew of errors coming from Mail. I noticed it involved something called "httpmail", a third party plugin for Mail. So I went to the Library folder [/username/Library/Mail] where all plugins for Mail are stored. I went to the Bundles folder, and deleted all the bundles that were in there. I then relaunched Mail, and I jumped for joy when I saw the "Welcome to Tiger Mail!" message. it then imported all my mail, and its been working beautifully ever since! quick summary: Go to /username/Library/Mail/Bundles and delete all the bundles, and mail should then work. I hope this helps a lot of people.