Guides
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…How to Interpret DMARC Aggregate Reports and Trace Attack SourcesDMARC aggregate reports provide a structured view of how receiving mail systems evaluate messages claiming to come from your domain. They show sending IP…Why a Missing SPF Record Leaves Domains Open to SpoofingEmail spoofing becomes easier when a domain has no Sender Policy Framework (SPF) record. SPF is a DNS-based control that tells receiving mail systems which…Automate Daily Domain Reputation Checks With an APIA domain’s reputation can change quickly after a compromised mailbox, suspicious campaign, DNS modification, or sudden increase in sending volume. Manual…Bulk domain scanning with Trusted Sender ScoreManaging sender trust one domain at a time can slow down security reviews, vendor onboarding, and email investigations. Trusted Sender Score’s bulk check helps…How to Check Whether Your Domain Is on a Public BlocklistA domain appearing on a public blocklist can affect email delivery, website reputation, and customer trust. Blocklist operators track suspicious domains, IP…What a Domain Trust Score Reveals About Email HistoryA domain trust score offers a practical view of how an internet domain has behaved as an email sender. It can reflect signals associated with spam complaints,…Why a Failing SPF Record Can Damage Your Domain Reputation in HoursEmail authentication failures can become a reputation problem quickly. When receiving providers see messages that claim to come from your domain but fail the…