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How to add rDNS to your sending domains

How to Align your Domain via rDNS




The purpose of this article is to help users with adding rDNS on the domains of their Mailvio accounts. 


Why is rDNS important and how does it affect deliverability?

rDNS is important because it adds credibility to the mail server sending email and functions as an additional layer of email authentication. rDNS allows you to separate valid email senders versus compromised servers that are sending spam.

Another benefit of rDNS is that you don’t need to accept the entire message body to complete a rDNS lookup. You only need information in your message header which is sent at the beginning of an email chain. If the email fails rDNS, you can refuse it which will save server resources and prevent spam from reaching your inbox. Several major mailbox providers such as Gmail, Microsoft and Yahoo will block emails coming from a mail server without valid rDNS records. Also, some SMTP servers are configured to reject emails when the rDNS does not match the HELO.

However, keep in mind that mailbox providers place more weight on your overall IP address and domain reputation for deciding where your emails should be routed. rDNS is only one variable of many that will determine where your message should be delivered.


Steps on how to add rDNS to your account

1. On your Dashboard, go to your Company Profile > My Domains then click on the cogwheel icon to the domain you wish to add rDNS. 

2. Select the domain you wish to add the rDNS then click on the setup icon for that domain



3. On the new window, add the needed records listed there. After they've resolved, you may click on Check Records to see if you're successful.


Once all the records are added and resolved by your hosting provider then the cogwheel will turn to green indicating that the process is successful. 

If you have further questions, please reach out to us here