Koltrix
Deliverability
Display name spoofing: the attack DMARC does not stop
An attacker can send from any free mailbox with your CEO's name in the display field. Why authentication cannot stop it and what actually helps.
4 min read
DeliverabilityQuishing: QR code phishing and why filters miss it
QR codes hide malicious URLs inside images, out of reach of many link scanners. How quishing works, why it evades filters and what defenses help.
4 min read
DeliverabilityLookalike domains: detecting cousin-domain phishing
Typo and homoglyph domains pass authentication for themselves. Monitor new registrations, register obvious variants and train people to check senders.
4 min read
- Deliverability
Business email compromise: invoice fraud red flags
BEC scams change bank details or rush payments through email. Spot the red flags, add out-of-band verification and harden accounts against takeover.
4 min read