Master of Science in Computing in Cybersecurity

SMTP

Simple Mail Transfer Protocol for sending email securely.

DNS

Domain Name System for mapping names to IP addresses.

SPF

Sender Policy Framework to validate sending IPs.

DKIM

Cryptographic signatures to protect message integrity.

DMARC

Policy for handling failed SPF and DKIM checks.

State of DMARC in Ireland 2024

Mail-in-a-Box

Turn a server into a complete mail platform.

Visit Mail-in-a-Box

Redecentralized Internet

Self-hosting and decentralised services for resilience.

BEC Attacks

Business Email Compromise and ways to reduce risk.

Tools

Domain Auth Analyzer

Upload a TXT/CSV with domains and check SPF, DKIM (common selectors), DMARC, and optional BIMI. Charts + exact-copy PDF/CSV/JSON export. Browser-only.

Open domains-checker.html

Single-Domain DNS Check

Fetch SPF, DKIM, DMARC TXT, and check HTTP/HTTPS reachability. Friendly hints for next steps.

Open dns-check.html

DMARC Auto-Pilot

Drop your DMARC aggregate reports and get step-by-step fixes with a safe rollout plan (p=none → quarantine → reject). Includes RUA/RUF authorization safety check.

Open dmarc-autopilot.html

Header Reader

Paste raw email headers to see SPF/DKIM/DMARC verdicts, ARC, and alignment explained in plain English.

Open header-reader.html

DMARC Policy Snapshot — Irish Companies (Service & Manufacturing) — N domains

Based on business.ie “service” and “manufacturing” domains. Dataset was cleaned to remove duplicates and large international groups to better reflect Irish SMEs.