Hi, I'm using ISPConfig Version: 3.1.2 on Debian 8.0 All is working fine except of catchall and alias email. I have checked mail log, cf files and db tables ... No way An email sent to the mail box works fine If I try to send an email to an alias, I recive as reply this message: If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <alias@doamin>: user unknown Final-Recipient: rfc822; alias@doamin Original-Recipient: rfc822;alias@doamin Action: failed Status: 5.1.1 Diagnostic-Code: x-unix; user unknown Thanks for your help Bye Gherardo