Guides

Why Valid DKIM Does Not Make an Email Safe
A valid DKIM signature is a useful signal, but it is not a certificate of good intent. DKIM proves that an email was signed by a domain with access to a…
Using Reputation Scores to Make Safer Inbound Email Decisions
An inbound sender’s reputation score can help security teams decide how much scrutiny an email deserves before it reaches an employee’s inbox. Trusted Sender…
How to Identify a Spoofed Email That Copies an Exact SPF Record
A spoofed message can appear convincing even when it copies the target domain’s published SPF record perfectly. SPF is important, but it validates only a…
Reading High Recipient Rejection In DMARC Reports
A DMARC report with a high percentage of recipient rejection usually means that receiving mail systems are refusing messages that fail the sending domain’s…
How to use bulk domain lookups for vendor email security
Vendors often send invoices, account notices, marketing messages, password resets, and operational alerts on behalf of your organization. Each sending domain…
Why You Should Monitor DMARC Reports for Your Own Domains
A domain can look secure from inside your organization while external mail providers see a very different picture. DMARC reports reveal how messages claiming…
How DMARC Aggregate Reports Reveal Misconfigured Email Services
DMARC aggregate reports provide a practical view of how receiving mail systems evaluate messages sent from your domain. Rather than showing the content of…
How to check whether your email provider shares a blacklisted IP
Email delivery problems can sometimes be traced to the infrastructure behind your mailbox rather than your message content. Many providers send mail through…
Integrating Trust Scores Into Your Email Gateway
Email gateways make rapid decisions about messages entering or leaving an organization. Adding sender and domain reputation data gives those decisions more…
What Low Trust Means When Authentication Looks Healthy
A domain can pass SPF, DKIM, and DMARC checks while still receiving a low trust score. That combination is not necessarily contradictory. Authentication shows…