[Dovecot] Error message in log

[Knute Johnson]

I'm getting the following message in my log;

     dovecot: IMAP(knute): 
fchown(/home/knute/mail/.imap/INBOX/dovecot.index.cache.lock, -1, 
8(mail)) failed: Operation not permitted (egid=1000(knute), group based 
on /var/mail/knute): 1 Time(s)
     dovecot: IMAP(knute): 
fchown(/home/knute/mail/.imap/INBOX/dovecot.index.log.newlock, -1, 
8(mail)) failed: Operation not permitted (egid=1000(knute), group based 
on /var/mail/knute): 2 Time(s)
     dovecot: IMAP(knute): 
fchown(/home/knute/mail/.imap/INBOX/dovecot.index.tmp, -1, 8(mail)) 
failed: Operation not permitted (egid=1000(knute), group based on 
/var/mail/knute): 4 Time(s)

I got these once before on the /var/mail/user files and changed the 
permissions to 600.  /home/knute/mail/.imap/INBOX is 770 and the index 
files are 600.  Is this a problem with the directory privilege?

Thanks,

-- 

Knute Johnson
knute2011 at knutejohnson.com