Sinds de upgrade naar Plesk 11.0.9 alsmaar problemen met qmail:

[root@server log]# cat maillog | grep maildirsize
Aug  8 06:59:15 server check-quota filter[16147]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 07:55:45 server check-quota filter[16337]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 07:55:45 server check-quota filter[16338]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 07:55:45 server check-quota filter[16341]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 08:44:18 server check-quota filter[16460]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 08:44:18 server check-quota filter[16462]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 08:44:18 server check-quota filter[16464]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 09:07:30 server check-quota filter[16486]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 09:33:11 server check-quota filter[16535]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 09:35:02 server check-quota filter[16555]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 09:35:02 server check-quota filter[16557]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 09:35:02 server check-quota filter[16559]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 10:24:10 server check-quota filter[16657]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 10:24:10 server check-quota filter[16658]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 10:24:10 server check-quota filter[16661]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 11:15:21 server check-quota filter[16739]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 11:15:21 server check-quota filter[16738]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 11:15:21 server check-quota filter[16741]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 12:07:25 server check-quota filter[16888]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 12:07:25 server check-quota filter[16890]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 12:07:25 server check-quota filter[16892]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.
Aug  8 17:03:59 server check-quota filter[25944]: maildirsize quota header is corrupted. Please run mail_restore utility to fix.

[root@server log]# /usr/local/psa/admin/sbin/mchk --help
Restore settings for all mailboxes.
Usage: /usr/local/psa/admin/sbin/mchk [OPTION]
OPTIONS:
--without-spam   restore all settings except for SpamAssassin configuration
--with-spam      restore all settings
--spam-only      restore only SpamAssassin settings

[root@server log]# /usr/local/psa/admin/sbin/mchk --with-spam 
==> Checking for: mailsrv_conf_init... ok
==> Checking for: mail_handlers_init... ok
==> Checking for: mailsrv_entities_dump... ok
==> Checking for: mail_admin_aliases... ok
==> Checking for: mail_auth_dump... ok
==> Checking for: mailman_lists_dump... ok
==> Checking for: mail_kav8_restore... ok
==> Checking for: mail_responder_restore... ok
==> Checking for: mail_spam_restore... ok
==> Checking for: mail_grey_restore... ok
==> Checking for: mail_mailbox_restore... ok
==> Checking for: mail_spf_restore... ok
==> Checking for: mail_dk_restore... ok
==> Checking for: mail_drweb_restore... not exists