DNS records every developer sending email must understand (SPF, DKIM, DMARC explained)

📰 Dev.to · SendFleet

Learn about essential DNS records for sending email, including SPF, DKIM, and DMARC, to improve deliverability and prevent spam

intermediate Published 20 May 2026

Action Steps

Configure SPF records to specify authorized mail servers
Set up DKIM to digitally sign outgoing emails
Implement DMARC to monitor and control email delivery
Test email deliverability using online tools
Verify DNS record propagation using dig or nslookup commands

Who Needs to Know This

Developers and DevOps teams responsible for sending emails from their applications will benefit from understanding these DNS records to ensure reliable email delivery

Key Insight

💡 Proper DNS record configuration is crucial for preventing email spoofing and ensuring reliable delivery