Domain Name reverse resolution query command

 

Domain Name reverse resolution query command

If you do your own mail server, generally you need Reverse Domain name resolution, you can ask the IP provider for help.

Domain Name reverse resolution query command

To check whether reverse resolution is successful, run the following command: NSLookup-Qt = PTR yourip. You can see the reverse resolution result from the returned information.

NSLookup-Qt = PTR yourip

For example, my domain name is diyway.net.

My mail server address is mail.kerry.net.

Email user name format is username@kerry.net

Set the helo of the mail system to mx.kerry.net on the mail server.

Email server IP: 59.166.155.111

Resolve the IP address 59.166.155.111 to mx.kerry.net.

In Windows, run CMD in the Command box and then enter NSLookup-Qt = PTR 59.166.155.111 in the open window.

The returned information is as follows:

C: \ Documents ents and Settings \ User> NSLookup-Qt = PTR 59.166.155.111

Server: mx.kerry.net

Address: 59.166.155.111

This indicates that the anti-resolution of this IP address is successful.

The returned information is as follows:

C: \ Documents ents and Settings \ User> NSLookup-Qt = PTR 59.166.155.111

* ** Can't find server name for address 59.166.155.1: non-existent domain

Server: Unknown

Address: 59.166.155.111

This indicates that the anti-resolution of this IP address is not performed.

 

Method 2: directly ping the domain name to see if the corresponding IP address exists.