Due to the particular industry in which our company operates, we have to start running our own e-mail server and MTA on-site. This means that mail.ourdomain.com has to resolve to one of our IP addresses, and that this IP address has to reverse back to mail.ourdomain.com. We currently use TCH's email, and mail.ourdomain.com points to the server on which our site is hosted (Server24, to be exact).
Our new mailserver is about 24 hours from being ready. When the time is right, would it be possible for me to put in a service request for TCH to change the host (A) record for "mail" to the IP address of our new server? I can change the MX record for the domain through cpanel, but I cannot modify any DNS information. We do not plan to change our webhost, but we will have to host our domain name outside of TCH if this is not possible.
Thanks.