Problems delivering email

I have a user who has a problem getting mail delivered on one day of the week. The email for the user gets stuck in the mail.box and then after running fixup on her mailbox, the mail delivers. It doesn’t affect any other users and only affects the one user on this day. Any ideas on how to get this problem fixed?

Thank you.

Subject: Problems delivering email

I would guess that some weekly-scheduled server maintenance task is corrupting the user’s mailfile. Maybe running Compact -c -i will resolve the corruption permanently.