Hello, http://www.howtoforge.com/perfect-server-centos-5.2-ispconfig-3 I followed the how-to tutorial to setup my server and everything went well. After the setup and I transferred 5 or 6 hosts to my server and recently something weird is happening. When a user of one domain gets an email a copy of the same email goes to another domain. Completely different domains but to valid email addresses. Does anyone have any idea why this is occurring? Thank you.