Free Instant Scan

What Does Your Business
Look Like to a Hacker?

Enter your work email. We scan your domain in seconds and show you exactly what attackers see.

No account required Results in seconds Your email is never shared

Three standards that protect
your business from impersonation.

These DNS records control who can send email on behalf of your domain. Missing or misconfigured records leave your clients and partners exposed.

SPF

Sender Policy Framework

Tells receiving servers which IP addresses are authorized to send email as your domain. Without it, anyone can impersonate your firm.

DMARC

Domain-Based Authentication

Instructs mail servers what to do when a message fails verification. Without it, spoofed email lands in inboxes without warning.

DKIM

DomainKeys Identified Mail

Adds a cryptographic signature to every message you send. Proves your email has not been tampered with in transit.

Thirty seconds. Zero technical knowledge required.

Step 01

Enter your work email

Type in any email address at your company domain. We extract the domain and begin querying DNS records immediately.

Step 02

We scan your domain

Our scanner queries your MX, SPF, DMARC, and DKIM records and checks your email against known data breach databases.

Step 03

Get your security grade

You receive a clear letter grade, plain-English findings, and exact steps to fix any gaps your IT team can act on today.

This scan is a one-time snapshot.

SentinelSMB monitors your Microsoft 365, Google Workspace, AWS, and Cloudflare around the clock — alerting you the moment something changes, with compliance documentation built in.