After few months i could get my ISPconfig working without a problem. I can create websites, clients and all the DNS option, just fine. However, I can not really get the email addresses right to my clients websites. The problem is that my clients email addresses is at this format: firstname.lastname@example.org, however i would prefer, email@example.com. I know that i have to define on co-domain, but that is nt working, how this is done? I have this on my co-domain: IP Hostname Domain 192.168.0.7 www banzaiwebhosting.com and this on the MX record: Mailserver Hostname www.banzaiwebstudio.com Do you have any information on how to become trustful on sending email to people? for example, i tried to send a email from Hotmail to my server and worked fine, however when i replied to hotmail, hotmail was blocking my emails from my server. any advices?