Dns forward lookup zone not updating server 2018
Note: This is the first in our series of tutorials on how to set up authentication mechanisms for your mail server, including r DNS, SPF, DKIM, and DMARC.One of the first things that a responsible ESP must deal with, before starting to mail on behalf of their customers, is Reverse DNS (r DNS from now on).
With Power Shell, an admin can not only perform DNS server management from the command line for quick one-off jobs, but also collect those commands into a script to handle numerous time-consuming tasks.
Before we go into how to set up your r DNS, let’s have a brief discussion of how email receivers use it, at the other end, to identify who is sending them email.
NOTE: The below discussion is highly technical, and you can skip it if you like, and go straight to the section ‘How to Configure r DNS‘.
It uses a special type of DNS Resource Record called a “Domain Name Pointer”, or “PTR” which is defined in RFC-1035 for this purpose.
You may think of r DNS as a caller-id of sorts, helping the receiver know who is trying to send email.