Technical guide on using the cPanel Email Deliverability tool to configure and validate SPF, DKIM, and DMARC records to prevent email spoofing and improve inbox placement.

Email Deliverability Tool: Verifying SPF, DKIM, and DMARC

High inbox delivery rates depend on cryptographically verifying the identity of the sender. Without proper authentication, major providers (Gmail, Outlook, Yahoo) will likely flag your mail as spam or reject it entirely. The Hovixa cPanel environment provides an automated Email Deliverability tool to manage these DNS-based protocols.

1. The Three Pillars of Authentication

To ensure 100% deliverability, your domain must pass three distinct checks:

• SPF (Sender Policy Framework): A TXT record listing the IP addresses authorized to send mail on behalf of your domain.
• DKIM (DomainKeys Identified Mail): Adds a digital signature to your email headers, allowing the receiver to verify that the email was actually sent by the domain owner and wasn't altered in transit.
• DMARC (Domain-based Message Authentication, Reporting, and Conformance): A policy that tells the receiving server what to do if SPF or DKIM fails (e.g., none, quarantine, or reject).

2. Using the Email Deliverability Tool

1. Log in to cpanel.hovixa.com.
2. Navigate to the Email section and select Email Deliverability.
3. Locate your domain in the list. If the status says Valid, no action is required.
4. If the status says Problems Exist (Invalid), click Manage.

3. Repairing and Configuring Records

The management interface displays the "Suggested" record vs. the "Current" record found in your DNS zone.

SPF Configuration

If you only send mail through Hovixa, click Install the Suggested Record. If you use third-party services (e.g., SendGrid, Mailchimp), you must manually edit the record to include them using the include: mechanism.

Example: v=spf1 +a +mx +ip4:1.2.3.4 include:servers.mcsv.net ~all

DKIM Configuration

The tool generates a unique 2048-bit private/public key pair. Click Install the Suggested Record to publish the public key to your DNS. This enables the server to sign outgoing mail automatically.

DMARC Configuration

cPanel does not always auto-install DMARC by default. To add a basic "monitoring" policy, click Manage and look for the DMARC section. A standard starting policy looks like this:

v=DMARC1; p=none; rua=mailto:[email protected]

Policy Note: Start with p=none. Once you verify that your legitimate mail is passing SPF/DKIM via reports, upgrade to p=quarantine or p=reject.

4. Critical Edge Case: External DNS (Cloudflare)

The "Install" buttons in cPanel only work if your domain uses Hovixa's nameservers. If you are using Cloudflare or another external DNS provider, the tool will show "Invalid" even after you click install.

Resolution:

1. Copy the Suggested Record (Value) from the Email Deliverability tool.
2. Log in to your external DNS provider (e.g., Cloudflare Dashboard).
3. Create a new TXT Record.
4. Paste the name/host and the value exactly as provided by cPanel.
5. Return to cPanel and click Check Again.

Post-Setup Verification

After updating DNS, verify your setup using external tools like Mail-Tester or MXToolbox. Ensure that the SPF record does not have more than 10 DNS lookups, or it will fail automatically due to protocol limitations.