Question : PTR Record with different incoming and outgoing IPs for the mail server.

We have a SPAM server that incoming email goes to. Our MX record points to this address.

Then we have our mail server going out on a different IP address.  My question is which IP address do I need to have my PTR record set to. Right now it is set to the same address as my MX record, but we are getting blocked by several mail servers for not having a PTR record.

When I look at the header of an email, it shows that it is coming from the IP of the mail server, which I would expect. So do I need to have 2 different PTR Records or just 1 from the Mail Server?

In my senario, do I need to have a PTR record at all for the incoming SPAM server?

Answer : PTR Record with different incoming and outgoing IPs for the mail server.

Agreed i too have been through this hell, to reiterate, irrespective of any relaying what ever public IP address your server makes outbound SMTP connections on, that IP address needs to have a PTR record your inbound IP address does not if it is a different address to the outbound one, but why not just put a PTR on all of your public IP addresses. the PTR does not have to match exactly the hostname of the mail server.