Tagged: Sender Policy Framework
Email AuthenticationSPF records tell receiving servers which IPs are authorized to send email from your domain — but they're also one of the most commonly misconfigured DNS records. This guide covers how SPF works, how to set it up correctly, and how to avoid the lookup limit trap that quietly breaks many production setups.
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Email AuthenticationSPF records authorize which IP addresses can send email from your domain — but they break in specific ways that are easy to miss. The 10-lookup limit, duplicate record conflicts, and forgotten sending services are the most common culprits behind SPF failures.
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Email AuthenticationSPF tells receiving mail servers which IP addresses are authorized to send email for your domain. Getting it wrong breaks delivery. Getting it right is the foundation of email authentication — here's how to do it correctly.
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