#SPF

Tagged: SPF

13 Jun 2026Sam wallness

SPF's 10-Lookup Limit: What It Is and How to Stay Under It

SPF enforces a hard cap of 10 DNS lookups. Exceed it and your record returns a permerror that breaks authentication for every mail you send. Here's how to diagnose and fix it.

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How to Roll Out DMARC to p=reject Without Losing Legitimate Mail

Email Authentication

13 Jun 2026Sam wallness

How to Roll Out DMARC to p=reject Without Losing Legitimate Mail

Moving to DMARC p=reject protects your domain from spoofing—but rushing the rollout can silently block legitimate mail. This phased guide takes you from p=none to full enforcement safely.

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