I am moving sites to my fresh new account over at Media Temple.

One of my clients uses their own mail server.
I had my current host set that up for me, but it looks like I can manage that using the Plesk CP provided at Media Temple.

Here is how I currently have it set up.
Code:
mydomain.com.	          NS	     ns.mydomain.com.	
ns.mydomain.com.	  A	     64.207.100.100	
mydomain.com.	          A	     64.207.100.100
mail.mydomain.com.	  A	     66.88.197.194
ftp.mydomain.com.	  CNAME	     mydomain.com.	
www.mydomain.com.         CNAME      mydomain.com.	
mydomain.com.	          MX (10)    mail.mydomain.com.	
64.207.100.100 / 24	  PTR	     mydomain.com.
So where, for this example... 64.207.100.100 is the IP for my server, and 66.88.197.194 is the IP for the Exange server provided by my client.

All I did was change the record for mail.mydomain.com to their Exchange server IP address. I have never done that before and would like a second pair of eyes before we test it. I believe this is how it is set up on their current server as their MX record resolves to mail.mydomain.com still.

Thanks.