This is the second time in three months that ALL of the messages in my Inbox disappeared.  Deleted messages are still there, but the Inbox -- NOTHING.  Even my flagged messages are gone.  The last time I asked for help, I received a link that didn't work, from an e-mail that didn't take replies.   I tried calling for help, but the tech was more interested in selling me an anti-virus program than finding my lost mail.  He claimed the problem was a virus in my Dell computer.  The only problem with that explanation is that I was using a MacBook when I lost the mail.  How can I retrieve the lost messages and keep this from happening again?