Why does Email Deliverability report a reverse-DNS problem?

Record the exact IP and hostname shown in Email Deliverability. Determine whether your service uses a shared mail IP, dedicated sending IP or external SMTP provider. Avoid changing the website’s A record simply because a PTR warning appears.

1. Open Email Deliverability > Manage and read the reverse-DNS or HELO explanation. Copy the expected and observed values.
2. Confirm which server actually sent an affected message by checking its headers or delivery report. An application using an external provider may have a different sending IP.
3. For a Nabtech-managed sending IP, send support the domain, IP, warning and a recent message ID. Ask for the relevant reverse-DNS and server-name alignment to be checked.
4. If you administer your own assigned IP, use the infrastructure provider’s supported reverse-DNS control and ensure the chosen hostname resolves forward appropriately.
5. After the provider changes the record and DNS caches expire, send a fresh test and review the result.

The sending IP’s reverse lookup should identify the intended mail-server name and agree with the server’s configured identity where required. This is one delivery factor among several.

Adding an arbitrary PTR entry inside the domain’s normal forward DNS zone usually does not control the actual reverse zone. If delivery remains poor, investigate SPF, DKIM, reputation, message content and recipient responses using concrete evidence.

Usually the provider maintains a server hostname appropriate for the shared mail service. Every customer domain cannot independently replace that one reverse identity with its own name.

• Repairing the SPF record recommended by cPanel Email Deliverability
• Publishing cPanel DKIM when DNS is hosted elsewhere
• Tracing a missing message with cPanel Track Delivery
• Why does forwarded mail fail when direct delivery works?

• cPanel: Email Deliverability In cPanel