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Set reverse DNS (PTR) records for your assigned addresses in the rDNS tab. Prepare the hostname’s forward DNS first: its A or AAAA record should resolve to the corresponding VPS address.

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Open the rDNS tab

Sign in to the EDBB Control Panel, open Services → My Services, select your VPS and choose rDNS.
Current rDNS tab with IPv4 PTR input, checkmark and cross buttons, and IPv6 suffix fields

Example addresses and hostname shown. Use your assigned addresses and a hostname you control.

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Set or remove an IPv4 PTR

  1. Find the row for your IPv4 address.
  2. Replace the PTR Record value with your fully qualified hostname, such as mail.example.com.
  3. Click the checkmark (Set) button to save.
  4. To remove your custom PTR, use the red cross (Unset) button.
Review the value after saving, then check the public result as described below.

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Add an IPv6 PTR

The IPv6 row shows the beginning of your allocation, followed by a suffix field and a hostname field.
  1. Enter the suffix for the IPv6 address you use. With an example prefix of 2001:db8:1234:5678:, the suffix :1 completes 2001:db8:1234:5678::1.
  2. Enter the matching fully qualified hostname in the next field.
  3. Click add, then review the record shown in the table.
Use only an address within your assigned allocation. Find it under Network.

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Verify the result

Replace the examples with your own address and hostname:
The reverse lookup should return the intended hostname, and the corresponding forward lookup should include the address. Public DNS caches can retain earlier answers until their TTL expires. If the result is unexpected, check spelling, the saved panel value and the forward record. PTR records alone do not replace a mail server’s SPF, DKIM or other configuration.