While not terribly expensive to maintain, this does cost me something.
If I don't get enough donations to cover that expense, I will be shutting the site down in early 2020.
Site Ground provides PTR records only on Cloud and Dedicated servers.
The IP addresses used on a Cloud or a Dedicated server are reserved for that particular server, and since you will be the sole occupant, they can be linked to your domains.
The zone transfer is configured and added DC IP but forwarding is not enabled ...
also on DC the zone is not enabled and now it is secondary zone and we cannot see any dynamic records in secondary DNS i.e Microsoft dns Plz advise what is the best option to configure to get the ddns ..
Servers that check these records (not all do) know when it really is your server that sent the mail; it is therefore less likely to be refused. Note: as we switch to IPV6, that also needs a PTR record.
See Kerio Spam Control: Caller-ID and SPF for more details. See Google's Additional guidelines for IPv6, for example. Inexpensive and informative Apple related e-books: Take control of Apple TV, Second Edition Take Control of the Mac Command Line with Terminal, Second Edition i OS 10: A Take Control Crash Course Take Control of Apple Mail, Third Edition Are Your Bits Flipped?
Because of its purpose, a PTR record is sometimes called Reverse DNS Record.
The purpose of a PTR record is mostly administrative - it shows an IP is in fact used with a particular domain.
There are two other DNS records that can be helpful in getting your mail through: Caller-ID and SPF.
These are records you can add to your own d NS and they help prevent people masquerading as your mail server.
You may have thought that you can add your own PTR record. A PTR record (sometimes called a "host PTR record") is what lets someone do a "reverse" DNS lookup - that is, they have your IP address and want to know what your host/domain is.