SPF, DKIM and DMARC are email authentication methods.
They help receiving mail servers verify that emails sent from your domain are legitimate.

Correct configuration is essential for reliable email delivery.

Why These Records Matter #

Without proper authentication:

• Emails may be marked as spam
• Emails may be rejected
• Your domain reputation may be damaged

Most modern email providers require all three.

SPF Explained #

SPF stands for Sender Policy Framework.

SPF:

• Defines which servers are allowed to send email for your domain
• Is stored as a DNS TXT record
• Prevents sender address spoofing

Only servers listed in the SPF record are allowed to send email.

DKIM Explained #

DKIM stands for DomainKeys Identified Mail.

DKIM:

• Adds a digital signature to outgoing emails
• Allows receiving servers to verify message integrity
• Confirms the message was not altered

DKIM works automatically once enabled.

DMARC Explained #

DMARC stands for Domain-based Message Authentication, Reporting and Conformance.

DMARC:

• Uses SPF and DKIM results
• Defines how receiving servers handle failures
• Allows reporting on authentication results

DMARC policies can monitor, quarantine or reject emails.

Default Setup at ProRedLine #

For supported domains:

• SPF is automatically generated
• DKIM is enabled by default
• DMARC is set to a safe monitoring policy

This configuration works for most users.

When Changes Are Required #

Manual changes may be needed if:

• External services send email for your domain
• Multiple providers are used
• Third-party tools require authentication

SPF records must be updated carefully to avoid conflicts.

Common Configuration Mistakes #

• Creating multiple SPF records
• Removing DKIM records
• Using strict DMARC policies too early
• Forgetting to include external senders

These mistakes often cause email delivery failures.

Where to Manage These Records #

You can manage:

• Authentication status in cPanel under Email Deliverability
• DNS records in the DNS Zone Editor

DNS changes require propagation time.

Responsibility Notice #

You are responsible for:

• Maintaining correct authentication records
• Adding external services properly
• Monitoring email delivery after changes

ProRedLine does not automatically fix custom email setups.