Microsoft 365 phishing protection that goes beyond Defender
Microsoft Defender catches known threats. SpoofDefense catches the targeted attacks that still get through — impersonation, vendor fraud, internal spoofing, and payment scams.
Real-World Scenario
Anatomy of a $125K wire fraud attempt
This is how a typical business email compromise unfolds — and where each layer of defense succeeds or fails.
The email arrives
Your controller receives an email from what appears to be your CEO asking for an urgent wire transfer to close an acquisition.
The domain looks legitimate
The sending domain is yourcompany-corp.com — registered 48 hours ago, with valid SPF/DKIM and no malicious history.
Defender lets it through
Microsoft Defender sees a clean domain with proper authentication. It passes every filter.
SpoofDefense catches it
SpoofDefense detects the lookalike domain (1 character off from your real domain), flags the urgent payment language, cross-references the sender against 256M+ registered domains, and quarantines the email before anyone sees it.
Side by Side
Microsoft Defender vs SpoofDefense
| Capability | Defender | SpoofDefense |
|---|---|---|
| Spam & known malware filtering | (complementary) | |
| Known malicious URL blocking | ||
| Lookalike domain detection | Limited | Yes |
| Sender impersonation | Limited | Yes |
| Vendor impersonation | ||
| Payment & invoice fraud | ||
| Brand similarity monitoring | ||
| Two-layer review |
SpoofDefense is designed to complement Defender, not replace it. Together they provide layered protection.
The Problem
What Microsoft Defender misses
Executive Impersonation
Emails from lookalike domains that mimic your CEO or CFO
Vendor Invoice Fraud
Fake payment requests from domains that closely resemble real vendors
Internal Spoofing
Messages that appear to come from internal addresses but originate externally
Delayed Detection
Threats detected hours after delivery, when damage is already done
The Solution
26 detection methods working in real time
SpoofDefense layers multiple detection engines on top of Defender, catching the targeted attacks that signature-based filters miss.
- Spots domains that look almost identical to yours or your vendors’ — checked against 256M+ registered domains
- Detects when someone is pretending to be an executive, coworker, or trusted contact
- Flags suspicious payment requests, invoice changes, and wire transfer language
- Every suspicious email is reviewed twice — once by our detection engine, once by a deep analysis layer
- Checks every sender against real-time threat intelligence from global feeds
- Continuously monitors for new domains that mimic your brand
ROI
The math is simple
$125,000
Average cost of a single business email compromise
SpoofDefense costs less than a team lunch per employee per month. One blocked attack pays for years of protection.
Customer Story
Real protection, real results
“We used to lose hours every week chasing suspicious emails. Spoof Defense caught a BEC attempt our Microsoft filters completely missed — it would have cost us $340K.”
David Park
IT Director, Regional Healthcare Group
Easy Setup
Deploys in 5 minutes via Graph API
Connect your Microsoft 365 tenant with a single OAuth authorization. SpoofDefense reads email metadata through the Microsoft Graph API — no MX record changes, no mail flow disruption, no agents to install.
No MX changes
No mail flow disruption
No hardware
FAQ
Common questions
Does SpoofDefense replace Microsoft Defender?
No. SpoofDefense works alongside Defender as a complementary layer. Defender handles spam, known malware, and safe links. SpoofDefense catches the targeted attacks that slip past those filters — emails from fake domains, people impersonating executives or vendors, and fraudulent payment requests.
What Microsoft 365 data do you access?
SpoofDefense connects via the Microsoft Graph API and reads email metadata — sender addresses, domains, headers, and authentication results. We do not read or store email body content or attachments.
Do I need to change my MX records?
No. SpoofDefense connects via API, not through your mail flow. There are no MX record changes, no mail routing changes, and no impact on email delivery.
How long does setup take?
Most organizations are scanning within 5 minutes. You authorize SpoofDefense via OAuth in your Microsoft 365 admin console — one click, no agents to install, no DNS changes.
Can I use this with Proofpoint or Mimecast too?
Yes. SpoofDefense works alongside any email security stack. Many customers run it on top of both Defender and a third-party gateway for maximum coverage.
See what your current email security is missing
Start a free trial and discover the threats that are getting through to your team.