AI operating notes: governance before acceleration
Operating boundaries for using AI in production work: ownership, authority, evidence, approval and rollback.
Tutorials
The tutorials now live on blue-canoe.net. The links below take you to their maintained replacements. You can also browse all technical guides and working notes.
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Humane forms: designing for trust and recovery
Experience-led guidance for forms, payments and automated workflows that reduce uncertainty without manipulating users.
Reading Microsoft mail responses
A reference for documented Outlook.com SMTP responses, with Exchange Online NDRs kept separate.
DKIM and DMARC alignment
How DKIM signing and DMARC alignment work, with policy, reporting and a practical approach to enforcement.
DMARC policy and reporting
The DMARC policy and reporting sections of the combined DKIM and DMARC alignment guide.
Delivering mail to Gmail
Gmail authentication, subscription, reputation and Postmaster Tools requirements, separated from operational recommendations.
Email deliverability: a diagnostic method
A provider-neutral process for diagnosing authentication, reputation, policy and delivery failures.