How to Verify Your rDNS Record | Zimbra

Alert! This article is written for Zimbra OSE users. As of December 2023, Synacor will no longer be providing support for Zimbra OSE. You might want to consider trying out Carbonio Community Edition – Zextras’s free and open-source email and collaboration platform.

For additional guidance, check out our community articles detailing the process of migrating from your current platform to Carbonio CE.

rDNS Record Verification

Assuming you have already created your rDNS record, added it to your DNS, and want to check your rDNS configuration. The rDNS record is stored in DNS as PTR and you can manually check the rDNS record for an IP address by using nslookup or dig as follows

1. In the terminal type

nslookup -type=PTR yourIP


dig -x yourIP

Replace yourIP with your IP address,

2. If an rDNS record exists, the result would contain your domain name.

To test your rDNS, you can also check if the DNS entry for your rDNS is correct by entering your IP address into up.aspx. If you set your DNS entry correctly it will show you your domain meaning your rDNS passed the test.

Download Zextras Suite for Zimbra OSE

Post your comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

How to Verify Your DMARC Record | Zimbra
What Is Zimbra Postscreen? | Zimbra