Free, no-signup domain check
Anyone can send an email that looks like it’s from you.
Most business domains have no lock on who’s allowed to send mail as them. That’s how invoice scams, fake “urgent wire” requests, and phishing attacks that impersonate your company get through. Run a free check to see where your domain stands, right now.
- Takes about 10 seconds — just enter your domain
- Plain-English score, not a wall of technical jargon
- Built and monitored by Diamond — a Wilmington-based MSP since 1996
Domain trust check
What’s your score?
Enter the domain you send email from (e.g. yourcompany.com) to see if it’s protected against impersonation.
We only look at public DNS records for the domain you enter. No account, password, or mailbox access required.
In plain English
What the scan is actually checking
The report will mention three acronyms. Here’s what they really mean — no IT degree required.
SPF
The guest list
Who’s allowed to send mail as you
SPF is a list your domain publishes that says exactly which mail servers are allowed to send email on your behalf. No list, or a loose one, means almost anyone can claim to be sending from your address.
DKIM
The signature
Proof the email wasn’t tampered with
DKIM attaches an invisible digital signature to every email you send. Inboxes can check that signature to confirm the message really came from you and wasn’t altered along the way.
DMARC
The rulebook
What happens when a fake shows up
DMARC tells inboxes what to do when a message fails those checks: let it through, flag it, or block it outright. Without a DMARC policy, most inboxes let the fake through anyway.
What’s actually at stake
An unprotected domain isn’t a technicality — it’s an open door
When your domain isn’t locked down, criminals can send email that looks 100% legitimate to your customers, vendors, and even your own employees. Here’s what that turns into.
Financial loss
A fake “change of bank details” email or a spoofed request from the CEO asking for an urgent wire transfer. These attacks — business email compromise — drove over $3 billion in reported U.S. losses in 2025 alone, and the money is rarely recovered once it moves.
$3B+ lost to BEC scams, 2025 FBI IC3 data.
Data loss
Impersonation emails are the easiest way in: a convincing “IT department” or “vendor invoice” message tricks an employee into handing over login credentials or opening a malicious attachment, giving attackers a foothold in your systems.
Phishing is consistently the #1 reported entry point for breaches.
Customer & trust loss
When scammers spoof your domain to target your own clients — fake invoices, fake password resets — your name is on the attack even though you didn’t send it. That’s a hard reputation to rebuild, especially for government and nonprofit partners bound by strict vendor trust requirements.
One impersonation incident can undo years of client trust.
How Diamond helps
A score is a starting point. We handle what comes after it.
Diamond Technologies has been protecting Mid-Atlantic businesses, nonprofits, and government agencies since 1996. Locking down a domain against impersonation is one small piece of the broader email and cybersecurity work our team handles every day.
- We fix what the scan finds. Missing or misconfigured SPF, DKIM, and DMARC records get corrected — without breaking your existing mail flow.
- We monitor it going forward. Domain protection isn’t “set once” — we track reports and adjust as your mail providers and vendors change.
- It plugs into your bigger security picture. Our vCISO and managed security services connect domain protection to the rest of your risk posture — not a one-off fix.
Why local businesses call Diamond
| Serving the Mid-Atlantic since | 1996 |
| Private, nonprofit & government clients | ~80 |
| Headquartered in | Wilmington, DE |
| Approach | vCIO / vCISO advisory |