Guides

Building an Automated Inbound Email Trust Filter
An inbound email filter can use sender-domain reputation as one signal in a broader decision process. When a domain falls below a defined trust score, the…
What repeated DMARC failures reveal about bulk email setup
A high number of DMARC failures from a legitimate bulk sender usually points to an authentication or alignment problem rather than an immediate sign of abuse.…
When Web Forms Damage a Domain’s Trust Score
A low domain trust score does not always follow a visible DKIM, SPF or DMARC failure. A business domain can pass recent authentication checks while its website…
Custom risk scores for inbound email
A custom risk score helps an organisation turn several email security signals into one practical decision. Rather than treating a sender reputation result, SPF…
Monitor Expiring Domain Trust Before Attackers Take Over
An expiring domain can become a valuable target long before it disappears from the internet. If it has a history of legitimate email, customer traffic and…
How to Check an Email Sender’s IP History Before Receiving Messages
An email can look convincing while coming from an infrastructure address with a poor record. Checking the sending IP before accepting a message helps reveal…
Understanding Relay-Information Alerts in DMARC Reports
A DMARC report indicator marked “Relay-Information” alongside unknown servers can be unsettling, particularly when a domain owner expects every legitimate…
Building a live feed of suspicious newly registered domains
A newly registered domain can become part of a phishing campaign within hours. Monitoring registration age alongside sender reputation, authentication results…
Detecting Phishing Behind a Valid DKIM Signature
A phishing email can pass DKIM and still be dangerous. This is especially true when an attacker controls a forwarding address, mailbox rule, or compromised…
Why Regional Trust Scores Matter for Your Email Domain
A domain can appear trustworthy to recipients in Sydney while triggering more scrutiny in Singapore, London or Los Angeles. Email reputation is shaped by…