How to Stop Spam Emails: SPF, DKIM & DMARC Explained
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By Steve Kemp / Tuesday, February 3, 2026 | 1 min
How to Stop Spam Emails: SPF, DKIM & DMARC Explained
Spam is more than just annoying — it can hurt your business reputation. The best defence is setting up SPF, DKIM, and DMARC for your domain.
SPF (Sender Policy Framework)
Specifies which mail servers are authorised to send on behalf of your domain.
DKIM (DomainKeys Identified Mail)
Adds a digital signature to each email so recipients know it’s genuine.
DMARC (Domain-based Message Authentication, Reporting & Conformance)
Combines SPF and DKIM to block spoofed emails and report abuse attempts.
Next Steps
Want to understand the basics? Start with our MX record guide. Then configure SPF, DKIM, and DMARC in your DNS zone.
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Categories
.au Domain Policies
Account Security
Analytics & Tracking
Cloud Commerce Software
DNS Management
DNS for Email
Data Protection & Backups
Digital Marketing & Growth
Domain Names
Email
Email Marketing & Newsletters
Getting Started
Performance & Optimization
Professional Email Setup
Registration and Transfers
Renewals & Expiry
SEO & Search Visibility
SSL Certificates
Security
Server & Website Security
SnowBILL Software
SnowRES Software
Social Media & Content Marketing
Spam & Malware Protection
Troubleshooting Email Issues
VPS & Dedicated Servers
WHMCS Modules
Web Hosting
Website Conversion & UX
cPanel Tips
osCommerce Modules
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