A medical billing company's cold-email campaign damaged its domain reputation so badly that ordinary one-to-one client emails vanished into spam. Untangling it took sixty days of mail logs, a five-test placement study, and a signature that was secretly impersonating a phishing attack — while revealing an active impersonation campaign nobody knew was running.
Read Details
A real estate agent hired me to fix email spoofing. What I found was an actively compromised WordPress site with four hidden backdoors, concurrent attacker sessions, and wire fraud attempts targeting his closings — all running silently for over two years.
Read Details
WordPress security audit case study exposing public backup files, form misrouting, and suspicious logins. Learn remediation and hardening priorities.
Read Details
cloud-sec-av.com is a legitimate domain used by Check Point Harmony Email Security (formerly Avanan). It appears in DMARC reports when Check Point scans incoming email for threats.
Read Details
SPF and DMARC case study: a partial SPF fix triggered authentication failures. Learn accurate attribution, alignment, and durable email policy design.
Read Details
Email authentication case study: hidden gateway broke DKIM and DMARC alignment. Learn how root-cause analysis fixed deliverability and trust.
Read Details
Email reputation determines inbox placement even with SPF, DKIM, and DMARC configured. Learn how scoring works and how to improve deliverability.
Read Details