getting a user permissions error

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getting a user permissions error
\ Joey (13 Mar 2008)
. \ Brian Evans (13 Mar 2008)

2 msg	551 mail refused

Subject:	getting a user permissions error
Group:	Postfix-users
From:	Joey
Date:	13 Mar 2008

I can't seem to figure out the proper security for this problem, any help
appreciated. I'm thinking /var/spool/mail permissions or something.

pluto popper[9602]: [SYS/TEMP] Unable to open temporary maildrop '/var/mail/