SecureMail Hub

Complete Email Authentication Solution

SPF DKIM DMARC

Configure Your Domain Security

Email Authentication Tools - SPF, DKIM, DMARC Generator

Email Authentication Tools

Generate SPF, DKIM, and DMARC records easily with this tool.

SPF Record Generator Sender Policy Framework helps prevent email spoofing by specifying which servers are allowed to send emails from your domain.

Your SPF record will appear here Copied!

Why Email Authentication Matters

Prevent Email Spoofing

Email authentication creates a verifiable connection between an email message and your domain. Without proper authentication, cybercriminals can easily forge the "From" address in their emails and pretend to be you.

91%

of cyberattacks begin with a spoofed email

Improve Deliverability

Major email providers like Gmail, Yahoo, and Outlook check authentication records before delivering messages. Properly authenticated emails are more likely to reach the inbox instead of being filtered as spam.

+23%

average increase in delivery rates with proper authentication

Build Trust & Brand Protection

Email authentication protects your reputation and builds trust with recipients. It prevents scammers from damaging your brand by sending phishing emails that appear to come from your domain.

74%

of consumers cite trust as a key factor in brand relationships

How Email Authentication Works

Understanding Our Email Authentication Tools

SPF

Sender Policy Framework (SPF)

SPF allows domain owners to specify which mail servers are authorized to send emails on behalf of their domain. It's essentially a "guest list" for your domain's email.

Prevents spammers from sending messages with forged "From" addresses
Reduces the chance of your domain being used in phishing attempts
Helps receiving mail servers determine if an email claiming to be from your domain is legitimate
example.com TXT "v=spf1 mx a ip4:192.168.0.1 ~all"
DKIM

DomainKeys Identified Mail (DKIM)

DKIM adds a digital signature to your emails, allowing receiving servers to verify the message was not altered in transit and was sent from an authorized server.

Cryptographically authenticates that an email was sent from your domain
Confirms email content hasn't been tampered with during delivery
Works alongside SPF to improve overall email authentication
selector._domainkey.example.com TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQ..."
DMARC

Domain-based Message Authentication, Reporting & Conformance (DMARC)

DMARC builds upon SPF and DKIM, providing clear instructions to receiving mail servers on what to do with emails that fail authentication checks.

Specifies how recipients should handle emails that fail authentication
Provides detailed reports about emails sent using your domain
Creates a feedback loop that helps improve email security over time
_dmarc.example.com TXT "v=DMARC1; p=reject; rua=mailto:[email protected]; pct=100"

Frequently Asked Questions

Do I need all three authentication methods (SPF, DKIM, DMARC)?

For optimal email security and deliverability, implementing all three methods is highly recommended. Each serves a different purpose:

  • SPF verifies the sending server is authorized
  • DKIM ensures the message hasn't been tampered with
  • DMARC provides instructions on how to handle authentication failures

Together, they create a comprehensive email authentication framework that maximizes protection against email-based threats.

Will implementing email authentication affect my existing email setup?

When properly configured, email authentication should not disrupt your legitimate email communications. However, it's important to:

  • Include all legitimate sending sources in your SPF record
  • Properly configure DKIM signing on all email servers
  • Start with a monitoring-only DMARC policy (p=none) before enforcing stricter policies

We recommend testing your configuration after implementation to ensure everything is working as expected.

How do I interpret DMARC reports?

DMARC reports provide valuable insights into your domain's email traffic, but they can be complex to analyze manually. You'll receive two types of reports:

  • Aggregate reports (RUA): Summary data about emails claiming to be from your domain
  • Forensic reports (RUF): Detailed information about specific authentication failures

Many organizations use specialized DMARC reporting tools to interpret these reports and gain actionable insights. These tools can help identify unauthorized senders and improve your email authentication configuration.

What DMARC policy should I use?

DMARC offers three policy options, and most organizations should implement them in phases:

  1. p=none: Monitoring mode - collects data without affecting delivery
  2. p=quarantine: Failed messages are marked as spam
  3. p=reject: Failed messages are blocked entirely

Start with "p=none" to gather data and identify legitimate email sources. After ensuring all legitimate sources pass authentication (typically 2-4 weeks), gradually move to stricter policies.

What happens if I have third-party services sending email on behalf of my domain?

Third-party services (like marketing platforms, CRMs, or help desks) that send email on behalf of your domain need to be accounted for in your authentication setup:

  • Include their sending IPs or domains in your SPF record
  • For DKIM, either have them sign with your domain (if they support it) or use alignment in DMARC
  • Consider using email subdomains dedicated to specific third-party services

Always check with your third-party providers for their specific authentication requirements and recommendations.