...right? I am using a mail server with Linux , IMAP protocol,currently when the mail is updated (get new mail in /var/spool/mail), the read-only right in the own group is reset to null, I need to execute a command 'chown o+r mailfile' to assign read only right to user group. (i need to copy this file from PC for backup purpose) How can I change the system to prevent the read only right being reset ?The linux version:Fedora Core release 5 (Bordeaux)Kernel 2.6.18-1.2239.fc5 on an i686sorry, the 'own' should be 'other'I issue the command 'chmod o+r mailfile'everytime if I need to copy to my PC.but the mail server won't crash.