How to check if mail server PTR is correctly configured

email-server

As mentioned here, mail server Reverse-DNS (PTR record) must configured well. most offen the FQDN is not in own control and it is defined by the ISP provider. and it never equals with mail server domain name. Requesting the ISP to change it, is not available, they don't change it. so:

  1. Does using this fqdn is use-less in mail server setup?
  2. How to verify that it is configured correctly?
  3. Is there any webtools to check it?

Thanks.

Best Answer

Because of what you are trying to do I would suggest that you try hosting your email with a hosting provider and get your own domain so you can make any of those changes as require. Now as for your questions:

  1. Does using this fqdn is use-less in mail server setup?

    You Should use fqdn.

  2. How to verify that it is configured correctly?

    As stated by wtayyeb you can use dig ie:

# get A record for domain
$ dig +short mail-vn0-f47.google.com
209.85.216.47 <--------------------- A record

# get reverse record for the A record & verify reverse matches domain
$ dig +short -x 209.85.216.47
mail-vn0-f47.google.com. <---------------- IP resolves back to domain

As you can see IP resolved back to the originating FQDN.

  1. Is there any webtools to check it?

    Yes theres a few webtools out there. One that I've used in the past & its pretty good is:

http://multirbl.valli.org/

If you need more webtools its always easy enough to google for test PTR or rDNS records.

Hopefully that's what you were looking for & keep in mind that hosting your domain with a hosting service { like dreamhost.com :) } will probably be the best way to set all your email stuff up.

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