Guides
Why a failing DKIM check can signal a man-in-the-middle attackEmail authentication failures are often treated as routine delivery problems. A sender may have published the wrong DNS record, rotated a key without updating…How To Detect A Homoglyph Attack In An Email Sender NameA spoofed email can appear trustworthy because its sender name looks familiar at a glance. Attackers use homoglyphs—Unicode characters that resemble ordinary…How to Identify a Domain Hijacked for Spam CampaignsA domain can become associated with spam even when its owner never approved a campaign. Attackers may take over a registrar account, alter DNS records,…How Domain Reputation Data Improves Phishing Awareness TrainingPhishing awareness training is strongest when it reflects the threats employees actually encounter. Generic examples can teach basic warning signs, but domain…How to Verify an Invoice Sender Before You ReplyAn invoice email can look routine while concealing a serious payment scam. Fraudsters often impersonate suppliers, executives, contractors, or familiar brands…What DMARC report volume reveals about your email ecosystemA large number of DMARC reports can look alarming, but volume alone is not proof of an attack. It is a measurement of how many receiving mail systems are…Automate Spoofed Email Incident Response With the APISpoofed emails can reach employees, customers, and partners before a security team has time to investigate them manually. An automated response process helps…Detecting Phishing From an SPF-Authorized ServerA phishing email can pass a basic SPF check and still be dangerous. SPF confirms that a message was sent from an IP address authorized by the domain’s SPF…Bulk Domain Checking for Vendor Email SecurityVendor relationships often depend on email, from invoices and support tickets to password resets and operational alerts. That makes a supplier’s domain…How to Analyze DMARC Failure Reports for Compromised AccountsDMARC failure reports can reveal that messages claiming to come from your domain are being sent through unauthorized systems. They are valuable for detecting…