[Postfix-es] problema mail

[coco alcazar]

Amigos, tengo este pequeño problema con 2 usuarios y no sé a que se
refiere, espero me puedan ayudar, les pego el mensaje:



This is the mail system at host mail.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<Carlos.Chavez en mail.com>: cannot update mailbox /var/mail/carlos.chavez for
    user carlos.chavez. cannot open file: Permission denied



Reporting-MTA: dns; mail.pe.g4s.com
X-Postfix-Queue-ID: C40CAAD8F60
X-Postfix-Sender: rfc822; humberto.alcazar en mail.com
Arrival-Date: Fri, 23 Nov 2007 15:26:59 -0500 (PET)

Final-Recipient: rfc822; Carlos.Chavez en mail.com
Original-Recipient: rfc822;Carlos.Chavez en mail.com
Action: failed
Status: 5.2.0
Diagnostic-Code: X-Postfix; cannot update mailbox /var/mail/carlos.chavez for
    user carlos.chavez. cannot open file: Permission denied