We have an MS Exchange deployed on an ISP network in our office. Currently, when a mail recipients' server would try to lookup an IP of the server, from which it is receiving a message, that is marked as, for example, from ourdomain.com, it doesn't find a DNS PTR record.
I am to ask a provider to add one to the DNS Server, that is covering the zone, on which our IP is located.
We are sending messages as senders from two domains. Can I ask a provider to set up a DNS PTR to return two domains on one IP?