I have various rules set in Mail (1.3) to sort incoming messages. I recently switched to an IMAP server and have learned that rules which move a message from that accounts Inbox to a local folder removes the message from the server.
My current work around is another rule that copies any message for that account to a folder created on the server (named Delivered). It works but isn't ideal.
Anyone else experience this? Does it happen in Mail 2.0?