Ongoing defence against email-borne threats

Strengthen email security with adaptive threat filtering and detailed visibility into phishing, spoofing, and malware campaigns.

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Email Security

Outsmart phishing and spoofing with advanced Sublime Security

Email remains the most common entry point for cyber threats — and most outdated tools can’t keep up with the evolving tactics. Cythera uses Sublime Security’s powerful, customisable detection engine to stop phishing, BEC, and zero-day threats before they reach your users. Our platform leverages natural language processing, AI, and machine learning for advanced protection that adjusts to real-world attack patterns. Behind the scenes, our team continually refines detection logic and adapts rules to fit your business — so you’re protected against today’s threats, not yesterday’s. It’s email defence built on flexibility, transparency, and expert insight. What you get:

Rapid setup compatible with Microsoft 365 and Google Workspace
Human-led tuning and detection improvements based on real activity
Intelligence on email-based threats, not just a count of blocked attempts
Transparent rules you can review and control — no mystery-box
AI Seamless integration with tools like MDR, SIEM, and SOAR for rapid response

Service detail

Email protection, reimagined for modern threats

Cythera’s managed email security, powered by Sublime Security, delivers adaptive protection against phishing, BEC, and evolving social engineering techniques. Instead of relying on outdated static rules, Sublime detects threats through behavioural and contextual analysis—reviewing message content, sender habits, language cues, and technical headers in real time. Natively integrated with Microsoft 365, it inspects all mail traffic without disrupting performance. Our analysts continuously refine detection logic to match your unique risk profile, using threat intelligence and real-world scenarios. We handle investigations, responses, and provide clear, actionable reporting—so your team remains informed without being overloaded. With Cythera and Sublime, you get robust behavioural detection in a fully managed, expert-driven service.

Smarter protection for modern email threats

Real-time behavioural detection with analyst expertise

Today’s email threats are fast, targeted and ever-changing. We combine automated detection with expert-led analysis to stay one step ahead.

Identify live behavioural anomalies, not just known signatures
Analysts investigate and validate each suspicious incident
Share focused reports with actionable next steps

Our delivery process

How we deliver Managed Email Security with Sublime

Our managed email security service uses Sublime Security’s behavioural-based detection engine to stop phishing, business email compromise and other threats that bypass legacy filters. Deployed behind your current email gateway or Microsoft 365, Sublime examines the full message context – from headers and content to behavioural patterns – in real time. We manage everything end to end, from setup and tuning to threat analysis and reporting. Our analysts write tailored detection rules that reflect your environment, giving you more accurate alerts and less noise. With Cythera managing your email security, you get real protection backed by real people.

Deploy and integrate

We integrate Sublime into Microsoft 365 or your current email gateway with zero disruption to operations.

Tune and tailor detections

We build tailored detection rules aligned to your infrastructure, risk appetite, and emerging threat patterns.

Monitor, report and escalate

Our team monitors your environment around the clock, investigates threats as they arise, and delivers concise reports with steps to strengthen your security when action is required.

Benefits

Why choose Cythera for Managed Email Security Services

At Cythera, our email security is built for today’s threats – adapting to evolving tactics rather than relying on outdated filters.

One secure partner

We handle every aspect of email security—from setup to fine-tuning detection—so your team can stay focused on what matters most.

Built for today's threats

We stop phishing, BEC, and emerging threats that slip past traditional defences—leveraging behavioural analytics and contextual signals.

People you can call

You’ll speak directly with analysts who cut through the noise—investigating alerts and providing answers that actually help.

What comes next

Expand your security coverage

We go beyond email. Our team helps uplift your wider security posture — from improving detection and response to securing your cloud environment.

Tune and enhance detection across key systems
Broaden protection to cover cloud applications, devices and user access
Receive expert guidance to prioritise your next steps effectively

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Web Filter, CASB & DLP (Cloud Access Security Broker & Data Loss Prevention)

Monitor and manage how users interact with cloud, web, and AI platforms — including movement of sensitive data.

Web Application Penetration Testing

Uncover hidden flaws in your web apps — from session handling to access controls — through in-depth security reviews.

Frequently asked questions

From risk assessment to rapid response - we’re with you every step of the way.

Are detection rules tailored to fit our business?

Absolutely. Our engineers continuously refine detection rules to suit your threat environment and risk tolerance, ensuring your defences adapt as threats evolve.

How does Cythera protect against phishing and email threats?

Powered by Sublime Security, our email protection blocks phishing, spoofing, and BEC attempts before they reach users. It adapts based on threat behaviour, not just static rules, to detect and stop evolving attacks.

How does this improve oversight and governance of our environment?

We provide clear visibility into email threats, detection results, and response efforts. Unlike black-box tools, our platform offers transparent reporting and integrates seamlessly with your existing security systems.

How is this solution better than a standard secure email gateway (SEG)?

Our email protection platform uses behaviour analysis, AI-powered threat detection, and live intelligence feeds to block phishing, malware, and BEC threats in real time - offering stronger protection than legacy filters can match.

Is this compatible with Microsoft 365 and Google Workspace?

Fully supported with both platforms. Our platform integrates natively with Microsoft 365 and Google Workspace, enabling fast deployment and consistent protection without interfering with how your teams use email.