Hi I've got 2 scenario.
One of my clients is hosting their email with a static ip. Some clients are rejecting their mail because they do not have a valid PTR record. I know I got to go thru an ISP to add the PTR record. Which IP should i tell them? Is it the MX record of that mail server or any public IP within the available range of that client? Say the MX record is 126.96.36.199. Must the PTR record be like 188.8.131.52 to mail.abc.com?
Another client of mine is not hosting their email but downloading email by Mdaemon throught POP. Their outgoing mails are sent out by Mdaemon directly. If this is the case, shall i apply their PTR record to be one of my client's public ip address?