Note: This article has the reference to the issue with the fix available:
"Using the mchk utility on a mailbox with non-empty Trash resulted in
the ‘Email Addresses’ tab on the domain page showing a miscalculated size of this mailbox."
- Plesk Onyx 17.5.3 Update 25 16 October 2017 (Linux)
Index cache file stored in
is calculated by Plesk statistics causing mail quota for particular domain exceeding its limit. This behavior is caused by the bug with ID
How to exclude this file in order to prevent mail quota being exceeded for Plesk 12.5 and lower?
Upgrade Plesk to the latest version using Plesk installer.
As a workaround, change a directory where Dovecot stores its cache files which is by default domains maildir directory:
Connect to server over SSH.
Create a directory for cache files:
# mkdir /var/qmail/indexes
Set correct permissions:
# chown popuser:popuser /var/qmail/indexes
Create a new configuration file for dovecot:
# vi /etc/dovecot/conf.d/newconfiguration.conf
Put the following lines into the configuration file:
CONFIG_TEXT: mail_location = maildir:/var/qmail/mailnames/%Ld/%Ln/Maildir:INDEX=/var/qmail/indexes/%Ld/%Ln
Restart dovecot service:
# systemctl restart dovecot.service