Email Security Checker - SPF, DKIM, DMARC
Check your domain's email security configuration for free. Validate SPF, DKIM and DMARC records to protect against phishing and email compromise.
Check Your Domain's Email Security
Enter your domain name to analyse your SPF, DKIM, and DMARC configurations.
This tool performs DNS lookups to check your domain's email authentication records. No data is stored or shared.
Try These Example Domains
See how major companies configure their email security:
Understanding Email Authentication
SPF (Sender Policy Framework)
SPF specifies which mail servers are authorised to send email on behalf of your domain. It helps prevent spammers from sending messages with forged From addresses.
DKIM (DomainKeys Identified Mail)
DKIM adds a digital signature to your emails, allowing recipients to verify the message was sent by an authorised server and wasn't altered in transit.
DMARC (Domain-based Message Authentication)
DMARC builds on SPF and DKIM to tell receiving servers how to handle emails that fail authentication checks, and provides reporting on email activity.
Why Email Security Matters for Australian Businesses
The Cost of Email Compromise
Business Email Compromise (BEC) cost Australian businesses over $98 million in 2023 according to the ACCC Scamwatch. Without proper email authentication, attackers can impersonate your domain to trick customers, partners, and employees.
Benefits of Proper Email Authentication
- Prevent attackers from spoofing your domain
- Improve email deliverability to customers
- Protect your brand reputation
- Meet compliance requirements for government contracts
- Receive reports on who is sending email as your domain
- Reduce the risk of business email compromise
Frequently Asked Questions
What is SPF, DKIM, and DMARC?
SPF (Sender Policy Framework) specifies which servers can send email for your domain. DKIM (DomainKeys Identified Mail) adds a digital signature to verify email authenticity. DMARC (Domain-based Message Authentication) tells receiving servers how to handle emails that fail SPF/DKIM checks. Together, they protect against email spoofing and phishing.
Why is email security important for Australian businesses?
Business Email Compromise (BEC) cost Australian businesses over $98 million in 2023 according to the ACCC. Proper email authentication prevents attackers from impersonating your domain, protecting your brand reputation and preventing financial fraud.
How do I fix email security issues?
Email security issues are fixed by adding or correcting DNS records for your domain. SPF requires a TXT record listing authorised mail servers. DKIM requires public key records. DMARC requires a policy record. Our tool shows exactly what records you need to add.
Related Articles
Email Security Best Practices: Protecting Your Business Communication in 2025
Configure email authentication (SPF, DKIM, DMARC), implement advanced threat protection, and train users to recognise sophisticated attacks.
Read more Cyber SecurityBusiness Email Compromise: How Sydney SMBs Can Prevent Invoice Fraud and CEO Scams
Australian businesses lost $98 million to BEC attacks last year. Learn warning signs, prevention strategies and response protocols to stay protected.
Read more Cyber SecurityPhishing Awareness: How to Train Your Employees Effectively
Reduce your phishing risk by up to 90% with effective security awareness training for your team.
Read moreNeed Help Configuring Email Security?
Our team can help you implement SPF, DKIM, and DMARC correctly to protect your business from email-based attacks.