Security Blog
Practical cybersecurity guides for NZ businesses
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SPF
SPF Include Chain Limits: Why You Might Be Hitting PermError (And How to Fix It)
SPF records have a strict 10 DNS lookup limit, and it's easier to breach than you think. Here's why your SPF might be returning permerror, what's causing the bloat, and how to flatten your include chain without breaking mail flow.
SPF
What is SPF? Complete Setup Guide for Email Authentication in 2025
Sender Policy Framework (SPF) is one of the foundational email authentication standards that protects your domain from spoofing and improves deliverability. This guide explains what SPF is, how it works, and walks NZ businesses through setting up a correct SPF record.