Guides
Practical write-ups from real engagements, grouped by topic. Everything here is free to use — if something is unclear or you want help applying it, get in touch.
Digital Forensics and Incident Response
No guides published yet — check back soon.
Email Security
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Email Security Frameworks: Why SPF, DKIM, and DMARC Matter
What each framework does, example DNS records and headers, and how to move safely from
p=nonetop=reject. -
Exchange Online External Email Tags
The modern replacement for
[External]subject prefixes and yellow banners — and why it doesn’t break DKIM or ARC. - Turning off Direct Send for your .onmicrosoft.com domain Why the default tenant domain can bypass an external email gateway, and the PowerShell to close the gap.
- How to create an S/MIME certificate for your email address An OpenSSL walkthrough from private key to CSR to a PKCS#12 bundle you can import into Outlook.
Cloud Security
No guides published yet — check back soon.