Hi there
as you are using your own primary mailserver: mail.okaloosapa.com...
PTR records are actually created at the organization that provides you with your IP addresses and/or net block information.
Please contact that organization and ask them if they will provide that service. If not .. ask if they would allow a third party DNS company like zoneedit
to provide the reverse services. If they do..,. you can use the add a domain link on your zoneedit members page to add the net block data. Once the invoice has been paid you can set the PTR records through the DNS settings tab for that net block.
thanks
sandy