I am setting up a replacement for my current, Scalix-based, mail server (and web server).
The system's hostname is z9m9z, as my ISP is a backup mailrelay (for when my link is down), I want to keep this as the mailserver's name. Thus NOT use mail.domain.
So I will set up the system as z9m9z.domain. I will NOT be running DNS (or DHCP) on the box, but point to my domain's DNS server. In my DNS setup I will be leaving the mx records alone and just swapping out the boxes (actually I will build the SME version on another IP address, then once configured, swapping the boxes).
Any problem with NOT defining mail.domain in the DNS. I note that server-manager allows me to remove this DNS entry if I am running DNS on SME.
Also this box will NOT be
www.domain, another will, but I do want to allow webmail access, both locally and remotely.
And today is my chance to build this system.