I am in the process of moving my DNS records from Network Solutions to the Amazon Route 53 service. While I know and understand a little about the basic kinds of records, I am stumped on how to create the record that will point to the MX record on Network Solutions (if I'm even saying that right).

On Network Solutions I have this:

Mail Servers (MX Records)  

Note: Mail Servers are listed in rank order

myapp.net 
Add Sub-Domain
MXMailServer(Preference)    TTL  
inbound.myapp.net.netsolmail.net.(10)   7200    Network Solutions E-mail

I have read that the payload for an MX record state that it must point to an existing A record in the DNS. Yet in the example above, that inbound.myapp... record only has the words "Network Solutions E-mail" next to it. Our email is hosted at Network Solutions.

I have already created the CNAME records that look like this:

mail.myapp.net  7200   mail.mycarparts.net.netsolmail.net.
smtp.myapp.net  7100   smtp.mycarparts.net.netsolmail.net.

Since I am only using Amazon as the DNS, do I even need to do anything with that MX record? I appreciate your help, I googled and researched this before I posted, this is my first post on webmasters although I've been on SO for a few years.