AI verifies 15,000 emails/hour for mid-sized companies
01 Challenge
When thousands of emails per hour become a security risk.
In an enterprise environment, approximately 15,000 emails are processed per hour. This includes 300 to 700 distinct spam and phishing attacks per hour, as well as numerous messages in a gray area that previously had to be reviewed manually.
Significant effort
Emails in the gray area had to be evaluated manually.
Delay
Legitimate business emails may have been delivered late due to verification processes.
Lack of Traceability
Security decisions were only reproducible and auditable to a limited extent.
15.000
Emails per hour
300 - 700
Attacks per hour
> 95 %
Spam Detection Rate
70–85 %
Legitimate quarantine emails are automatically released
02 Concept/Implementation
Spam filters are evolving into intelligent security architectures.
OIT developed a highly available zero-trust email cluster architecture with integrated AI triage. Incoming messages are analyzed across multiple security layers and evaluated based on transparent criteria.
The platform combines traditional security mechanisms with automated AI analysis—without allowing security-related decisions to disappear into a "black box.".
SPF, DKIM, and DMARC
Verification of the sender, authenticity, and reputation.
Deep Packet & TLS Inspection
Keep track of status and routes at all times.
Content Analysis
Automated evaluation of suspicious content.
AI Triage
Intelligent classification of messages in gray areas.
S/MIME Validation
Verification of signed and encrypted messages.
Highly Available Routing
Scalable cluster architecture for enterprise operations.
03 Transparency
Security that makes decisions transparent.
The platform not only evaluates messages, but also makes security decisions reproducible and auditable. In this way, it combines automated threat detection with governance and compliance requirements.
What starts as a traditional spam-blocking solution thus becomes a central security and decision-making platform for corporate communications.
04 Result
Safety.
The new architecture automatically processes large volumes of email and reliably detects spam and phishing attacks. At the same time, legitimate messages are released from quarantine more quickly, and manual review processes are significantly reduced.
Greater Security
A spam detection rate of 95 % and an automated release rate of 70–85 % for legitimate emails in quarantine.
Less testing effort
Significantly reduced manual testing times through automated and traceable security decisions.
Highly Available & Scalable
A robust email security architecture designed for high email volumes and growing demands.
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