Guides
Why a Null MX Record Can Signal Phishing RiskEmail security investigations often begin with a domain’s DNS records. These records reveal whether a domain can receive mail, which servers are authorized to…What a Sudden Domain Trust Score Drop Reveals About AbuseA sudden decline in a domain’s trust score is rarely a meaningless fluctuation. It can indicate that attackers are impersonating the domain, compromised…Spotting Spoofed Emails Behind Familiar Mail BrandsA spoofed email can borrow the reputation of a familiar mail provider to look routine and trustworthy. Attackers may imitate Gmail, Microsoft Outlook, Yahoo…Build a Custom Trust Checker With Developer ToolsA custom trust checker can turn email and domain reputation data into a practical safeguard for a help desk, security dashboard, signup flow, or internal…How to Detect an Email Spoofing Your Company’s Sender AddressAn email can appear to come from your exact company address while being sent from an unrelated server. This technique, known as sender address spoofing, is…How to Protect Your Domain During an Email Server MigrationMoving email to a new server can expose weaknesses that were previously hidden by familiar infrastructure. DNS records, signing keys, sending services, and…How to schedule recurring trust score checks for critical domainsA domain’s email reputation can change without warning. A compromised mailbox, misconfigured DNS record, sudden increase in sending volume, or new third-party…How to Distinguish a Legitimate Email Relay from SpoofingA legitimate email relay forwards messages through an authorized mail server, often because an organization uses a cloud email provider, marketing platform,…How to Verify a Bulk Email Sender’s InfrastructureBulk email can support newsletters, transactional notices, and customer outreach, but the sender’s infrastructure deserves scrutiny before messages reach your…How to use sender reputation data to block high-risk emailsSender reputation data helps security teams decide whether an incoming message deserves delivery, quarantine, or rejection. It combines signals about the…