Security Blog
Practical cybersecurity guides for NZ businesses
MTA-STS Explained: Protect Your Domain from TLS Downgrade Attacks
MTA-STS is a modern email security standard that forces SMTP traffic to use strong TLS encryption, blocking downgrade and man-in-the-middle attacks. Here's how to deploy it properly for your New Zealand business.
Email Deliverability Checklist for New Zealand Businesses: The Complete 2025 Guide
Emails landing in spam? This comprehensive deliverability checklist helps New Zealand businesses get messages into the inbox. Covers authentication, sender reputation, content hygiene and ongoing monitoring — with NZ-specific examples.
DANE/TLSA Records Explained: Locking Down Mail Server Security with DNSSEC
DANE and TLSA records use DNSSEC to guarantee your mail server's TLS certificate is authentic — blocking downgrade attacks and man-in-the-middle interception. Here's how they work and how to deploy them for your New Zealand business.
How to Read and Analyse Email Headers: A Practical Guide for NZ Businesses
Email headers contain a wealth of information about where a message really came from and whether it can be trusted. This guide shows you how to read and analyse email headers step by step, with practical NZ-focused examples.
Why Your Emails Go to Spam (And How to Fix It in 2025)
If your business emails keep landing in the spam folder, you're losing sales, leads, and trust. Here's exactly why it happens — and the step-by-step fixes every New Zealand business should apply today.
DKIM Key Rotation: Best Practices and How-To Guide for NZ Businesses
Rotating your DKIM keys regularly is a critical but often overlooked part of email security. This guide walks New Zealand businesses through why DKIM rotation matters, how often to do it, and the exact steps to rotate keys safely without breaking email delivery.
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.