Symptom
Mail being transferred is lost if your network connection is interrupted.
Solution
Update to Mac OS X 10.2.1. For more information, see technical document 107036, "
Mac OS X: About the Mac OS X 10.2.1 Update".
Warning: Even under normal circumstances, transferring messages to a remote IMAP account is an example of an action that results in deletion of the original file as it is placed elsewhere. Generally speaking, copying a file to another computer does not delete the original file. It is important to remember that IMAP can be an exception to the general rule. Any time that you take this, or similar action, you should back up the original files first. For an example scenario, see technical document 106778, "
Mac OS X Mail: How to Import Email From a Non-Macintosh Computer".