DL Gallivan IT
Resources
Practical guidance on security, Microsoft 365, operations, and infrastructure.
Microsoft 365
2026-02-01
Microsoft 365 Email Authentication: SPF, DKIM, DMARC (Plain-English Guide)
A practical overview of how email authentication works and how it reduces spoofing and delivery issues.
Security
2026-02-02
Ransomware Readiness: The Fundamentals That Actually Reduce Risk
Identity posture, endpoint controls, backup validation, and why these matter more than buzzwords.
Operations
2026-02-03
Patching Without Disruption: How Curated Maintenance Reduces Surprises
A maintenance approach that prioritizes continuity while keeping systems aligned with best practices.
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