I'm getting ready to move a domain to a server hosted
on our site as opposed to contracting it out to a hosting provider.
We have a T1 connection with some IP address space assigned to us by the ISP. Currently this ISP handles
reverse DNS for our IP address space only. The domain
I'm moving is hosted elsewhere. The immediate need
is e-mail. I have a Linux box running Postfix that is
assigned one of the public IP addresses assigned to us.
I plan on setting up a DNS management account with Dotster
which is a web based domain DNS zone file management system. Dotster will actually be handling DNS for the domain name that we are moving. I will be setting up the MX and A records there and they will point to the IP address of my Linux box.
My question is: Will I need to have our ISP delegate reverse DNS for that IP address to us or will it be
okay as is?
I do have a real domain setup as a test. It is setup for DNS managment at Dotster and mail seems to be working fine coming in and going out of the Linux box. I just
need to know if I've just been lucky to not have any problems or if it's okay that the ISP handles reverse DNS.