Hi out there, i discovered a quite odd effect with ISPconfig 3 .1.11. When check the used email quota ISPConfig web backend shows 88kB for each mailbox. Customers with access to the backend reported the same effect. To get ahead i removed all .quotausage files. For some minutes the ISPConfig backend shows correct quota usages. But after some minutes the displayed values change back to 88kB when the quotausage-files get created again. I tried to re-write quota settings via the backend, but that doesn't change this behavior. Everything else works fine and as expected. Our setup is ISPConfig 3.1.11 on Debian 8 with postfix and dovecot. We habe three mailservers as cluster: mail1 is master. mail2 and mail3 are slaves. mail1 and mail2 use a shared /var/vmail directory which runs on a HP Storage P2000 G3 with ocfs2 as cluster filesystem. mail3 has its own /var/vmail which gets mirrored with mail1 / mail2 via unison. Dovecot Version: 2.2.13 Postfix Version: 2.11.3 I don't know what to do, does anybody have an idea?