I came across an error after upgrading a Plesk server from 8.6 to 9.2.3:
# /usr/local/psa/admin/sbin/mchk --with-spam ==> Checking for: mailsrv_conf_init... ok ==> Checking for: mail_mailbox_restore... 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_responder_restore... ok ==> Checking for: mail_drweb_restore... ok ==> Checking for: mail_kav_restore... not exsists ==> Checking for: mail_spf_restore... ok ==> Checking for: mail_dk_restore... ok ==> Checking for: mail_grey_restore... ok awk: cmd. line:50: (END OF FILE) awk: cmd. line:50: invalid char '�' in expression unable to process "pop3d" awk: cmd. line:50: (END OF FILE) awk: cmd. line:50: invalid char '�' in expression unable to process "pop3d-ssl" awk: cmd. line:50: (END OF FILE) awk: cmd. line:50: invalid char '�' in expression unable to process "imapd" awk: cmd. line:50: (END OF FILE) awk: cmd. line:50: invalid char '�' in expression unable to process "imapd-ssl"