[thecaoticone]

Here is the result "ls -l" on one my regular users.

-rw------- 1 vmail vmail 21 2008-01-25 20:43

One thing I caught in you first response:

"Deleted the file to let postfix re-create it (after sending myself a test). It did not."

Sorry if I did not explain it clearly, but you need to delete the maildirsize file before sending the test e-mail. Then after the e-mail arrives, check to see if Postfix re-created the maildirsize file.

If we can get Postfix to create the file, then it should update when mail arrives to / removed from the server.

The problem I had was Postfix failed to create the file at all, which seems to be the same problem you are having.