Run "mchk" to restored settings got error!

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We use Plesk 8.6 in linux , When I ran "/usr/local/psa/admin/sbin/mchk" that Got the below error messages?
has anyone can help me?

./mchk --without-spam
mchk: WARNING: @attachments directory is big enough to disable delivery!
System error 11: Resource temporarily unavailable
mchk: WARNING: @attachments directory is big enough to disable delivery!
System error 11: Resource temporarily unavailable
mchk: WARNING: @attachments directory is big enough to disable delivery!
System error 11: Resource temporarily unavailable
mchk: WARNING: @attachments directory is big enough to disable delivery!
System error 11: Resource temporarily unavailable
mchk: WARNING: @attachments directory is big enough to disable delivery!
mchk: WARNING: @attachments directory is big enough to disable delivery!

 

[igors]

Hi,

You can simply ignore this messages. They do not indicate that mchk failed to restore mail service settings.

These errors are somewhat debug information and they can arrive in the following situation: you have domain that has mail addresses configured with disabled mailbox - for example used as redirects. On domain you have mail qouta enabled. And even though mailboxes are configured only as redirects directory for these mailboxes are created so when utility runs it calculates total size of directories used by mail accounts on domains and if it finds that total size is greater than qouta limit on domain it gives such error.

This problem was fixed in version 9 and since then utiltiy does not produce such warnings.