I have found that the search function in mail.app no longer works. I can type an email address or name etc that I know for a fact is there but search fails to bring back any results. The company I work for has a system where whenever an email comes in it is read and then placed in a folder in mail called 'Completed' so we know the email has been seen by someone and acted upon. I noticed that occasionally the search function would not work and then I found it was getting worse now it simply no longer works. I think the best it manages is 2 characters in the search field then as soon as you type a 3rd it says no results found. Is there a way to rebuild the database or something? Is this a common fault? Without the search function I now have to manually search nearly 6000 messages. Any help would be greatly appreciated.