Set up Reverse DNS for a Dedicated IP Address

Setting up reverse DNS lets you whitelabel the domain name associated with your dedicated IP address.

Before getting started, you'll need to set up an A record pointing your subdomain to your dedicated IP address. The domain should be a subdomain (like mail.yourdomain.com) and can't be a root domain (like yourdomain.com).

You can also manage custom DNS settings through the Mandrill API using the Ips calls.

Add Reverse DNS Settings in Mandrill

  1. Go to the Add-Ons page.
  2. Click Configure reverse DNS under your dedicated IP address.
  3. Enter your subdomain and click Check Settings.
  4. In the modal window that appears, click Add Reverse DNS.

The reverse DNS setup process takes about 24 hours, as Mandrill needs to configure a PTR record mapping your dedicated IP address back to the domain name. Many ISPs verify the TTL on PTR records and may reject the email based on their spam filtering heuristics if the TTL is less than 24 hours.

If you have more than one dedicated IP, Mandrill will send the rest of your mail over your other dedicated IPs during the reverse DNS set up phase. If you have only one dedicated IP, Mandrill will send the rest of your mail over our shared pool of IPs during that time.

Edit reverse DNS

  1. Go to the Add-Ons page.
  2. Click edit under your dedicated IP address.
  3. Make any necessary changes and click the Check Settings button.
  4. In the modal window that appears, click Add Reverse DNS.

Remove reverse DNS

If you no longer want to whitelabel the domain name tied to your dedicated IP address, you can remove the reverse DNS settings in Mandrill. The domain name will revert back to the mandrillapp.com domain within 24 hours, during which time your email will send over our shared pool of IPs temporarily (or your other dedicated IPs if you have more than one).

  1. Go to the Add-Ons page.
  2. Click the remove reverse dns link under your dedicated IP address.
  3. Click the Remove reverse DNS button to confirm.