Anacron job 'cron.daily' errors

[slacker]

I am running Zentyal 3.2 community edition.

When ever I set a mail expiration period for Trash or Spam I get the follow error

/etc/cron.daily/archivemail:
archivemail: '/var/vmail/yyyy.com/user1/.Trash' is owned by someone else!
archivemail: '/var/vmail/yyyy.com/user2/.Trash' is owned by someone else!
archivemail: '/var/vmail/yyyy.com/user3/.Trash' is owned by someone else!
run-parts: /etc/cron.daily/archivemail exited with return code 123

It appears to be owned by ebox
drwxr-xr-x  5 ebox ebox  4096 Oct 13 11:53 .Trash/


Turn the auto delete off and the error goes away.

Any suggestions on how to correct?

TIA