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.
What we scan
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.
How it works
Thirty seconds. Zero technical knowledge required.
- Step 1
Enter your work email
Type in any email address at your company domain. We extract the domain and begin querying DNS records immediately.
- Step 2
We scan your domain
Our scanner queries your MX, SPF, DMARC, and DKIM records and checks your email against known data breach databases.
- Step 3
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.