Hi all I know this subject had a lot of threads along this community, and I've been reading a lot of it along this weekend, but turns out even following strictly all the recommendations I'v saw at some excerpts of the documentation, specially the part that covers PTR config, the results I got from MXTools always end up like mail.domain.com.z.y.x.in.addr.arpa. I've attached the screenshots so it would be easier to visualize any mistakes I've been doing. Thanks in advance if someone could provide any details about this issue. PS: I'm actually working in a Internet Provider company, which right now suffers from 'non-compliance' systems and I suggest to use ISPCONFIG instead of using a simple install of Bind and Debian. The thing is, I've been working for many years as Sysadmin and never got a chance to full implement ISPCONFIG as framework for internet providers. And yes, we own the IP entire block (actually 20 blocks) and I've tried in many ways to have it working, either creating the DNS zone manually, or by using the wizard.