Hello, I don't know when exactly quota warnings to client stopped to work but it seems it stopped work after upgrade to latest ISPConfig version few days ago. Warnings to administrator email work well but there are no warnings sent to client contact mail address. We have multiserver setup so I tried to find records in mail.log on ISPConfig master server and on web/mail servers too. I can find records for administrator email only but no records for customers mail addresses. Thank you for any advice.