Email Security

Ultra-modern multilayered protection for your entire organization from known, unknown and emerging email security threats. Stop large-scale phishing, targeted attacks, CEO fraud and malware in their tracks.

Unparalleled Threat Protection

Incorporates multiple technologies to ensure enterprise class threat detection rates with very high accuracy - over and above what single engine solutions can provide.

Total Control Over Mail Flow

Email Security combined with a full cloud based mail routing engine. Easily support multiple email service providers within a single domain and migrate between providers with ease.

STOP CEO Fraud in its tracks

CEO fraud is increasing exponentially. Email Security provides multi-layered protection incorporating unique features to defend against the modern email threat.

+ combine with other security products to unlock the benefits of ASE

Enable traditionally silo’d products to share and react to security events and state data whilst leveraging world class threat intelligence. Prevent attacks before they enter the kill chain.

What is ASE

Advanced Email Security

Censornet email security provides unparalleled and comprehensive protection for your business email users across all major email threats.

Traditional threats

Including spam, viruses, large-scale phishing attacks and malicious URLs.

Impersonation attacks

Modern, targeted and sophisticated email threats including Business Email Compromise (BEC) and CEO fraud.


Incorporates multiple traditional signature based and behavioral AV engines.

How it works

Email Security is 100% cloud based - making it quick and easy to set up - with just a simple MX record change, your mail flow is immediately protected.

Features & Benefits

Algorithm 10,000+ algorithms

Analysis of more than 134 variables that are extracted from every email message.

Layered Multi-layered protection

A unique combination of technologies.

Scan LinkScan™

Our unique time-of-click protection from malicious URLs.

Filter Outbound filtering

Filters and controls content in outbound messages.

Routing Advanced mail routing engine

Offers complete control over mail flow, and supports multiple email providers.

Encryption Email Encryption, Compliant Archiving & Continuity

Complement Email Security with a range of add-on products.

Intuitive user interface

Screenshot Yellow Email Rule Builder

Email Security visual rule builder

Screenshot Yellow Email Rules

Email Security message rules showing categorization and final action.

Screenshot Yellow Email Final Rules

Email final rules report

Interested in finding out more?

Arrange a demo or download our technical datasheet.

Reduce email data risks, optimize storage costs, improve productivity.

Analysis has shown that as much as 60% of business data is stored in email – and much of it exclusively (Source: IDC).

The Compliant Email Archive from Censornet captures and stores every message sent or received in a separate, secure, tamper-proof database in the cloud. Archived messages are de-duplicated, compressed, indexed and encrypted.

An intuitive search interface – accessible from any device – allows IT, HR, and end users themselves, to quickly find emails using multiple search criteria. Privileged users can rapidly search all mailboxes, or selected mailboxes, to respond to internal or regulatory requests.

  • Cost effective – licenses are only required for active users
  • Storing messages on a separate server can reduce premium mail server storage costs by up to 75%
  • Messages and attachments are fully indexed for lightning fast search
  • Users can search for and restore lost or deleted emails – without calling the helpdesk
  • Retention control automatically deletes messages as they age with the option to store messages indefinitely
  • In the event of a primary email service outage users have access to historic email via a web interface, accessible from any location and any device

Censornet Secure Mail is an add on to Email Security and provides a simple yet effective solution for user-based encryption of specific messages.

Adding a customizable keyword to the start of the email message subject sends a message containing a secure link to the recipients that log in to a secure website to view the contents of the message.

Secure Mail complements the policy-based encryption capabilities integrated within Email Security, with the ability to enforce the use of TLS for specified domains, as well as to use Opportunistic TLS for all messages – falling back to non-encrypted connections only if the receiving email server does not support TLS.

Eliminate downtime and maintain productivity in the event of email service failures.

For many organizations email is business critical and even short periods of downtime can have a devastating impact.

The optional Emergency Inbox add on for Email Security eliminates the disruption caused by outages or failures.

Emergency Inbox eradicates downtime in the event of an outage of your primary email service by providing users with access to 30 days of Inbox and Sent items via a simple-to-use web interface accessible from any location – and any device.

Email is routed through Censornet’s Email Security service and delivered to both the primary and Emergency Inbox. During an outage users have access to their Inbox and Sent items and continue to receive inbound email. And with the ability to send new or reply to messages they remain productive until the primary email service is restored.

  • Integrated with Email Security – Emergency Inbox messages are protected from email threats with the same rules and policies as primary mailboxes
  • Independent of the email service provider – works with Exchange on prem, Exchange Online (O365), Gmail, Hosted Exchange
  • Works alongside Censornet’s Compliant Email Archive that provides access to all historic email in the event of an outage

The Image Content Analysis (ICA) add on for Email Security protects employees and IT environments from inappropriate ‘Not Safe For Work’ (NSFW) images – including adult, offensive and extremist content.

ICA incorporates AI and deep learning technology to provide extremely high accuracy, eradicating false positives.

ICA enables powerful Acceptable Use Policy enforcement – without the need for human moderation – whilst protecting employees, avoiding legal liability, and maintaining company culture and brand image.

  • Prevent NSFW imagery from entering the environment in email messages and attachments
  • Identify users that are potentially misusing email systems
  • Detect and manage high-risk image and video content
  • Proactive, automatic enforcement of policy as and when required – with an audit trail to demonstrate action / protection

Simple Management
ICA is fully integrated within the Email Security service as an optional add on. ICA scans all images and videos in email messages and attachments automatically, quarantining or deleting inappropriate content.

Legal Liability
In most countries employers can be held vicariously liable for the actions of their employees – unless they can demonstrate they have taken all reasonable steps to protect their people from a hostile working environment.

ICA protects organizations from harassment and offensive content claims – or even criminal charges if illegal content is involved – and ensures a safe workplace for everyone.

Brand Preservation
Companies spend exceptional amounts of time and money building a compelling brand and positive brand image. Negative press coverage can damage an organization’s brand almost instantaneously but take an age to restore. ICA mitigates the risk of unwanted publicity.

Image Content Analysis is also available for CASB Inline Mode – scanning content of files uploaded to cloud storage applications including box, Dropbox, Google Drive, and OneDrive.

Image Content Analysis is also available as an add on for Web Security scanning all videos and images accessed online, replacing inappropriate content with a ‘safe’ symbol.

What our customers say

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“Our experience of business disruption and the time it took to clean up after a major virus infection is one that we never want to repeat ever again. We are delighted with Censornet Email Security, which has worked exceptionally well. We have received no spam and no junk mail at all. It represents excellent value for money and I have had no hesitation in recommending it to my colleagues within the online IT community.”

Martin Pilkington, IT Services Manager

Thatchers logo

“Looking at the different cloud security solutions on the market, Censornet’s is by far the most secure and straightforward. Censornet is lightweight in management yet robust in its offerings. The solution provides us with a level of security over and above that which other well-known brands could provide and is much less complicated to use. And as we grow as a business, we know that it will grow with us.”

Hamish Ross, Senior IT Engineer


Robust and powerful email security protection for global organizations.

Virus Protection


Spam Detection


SLA Delivery


Our platform

Our cloud security platform integrates email and web security, CASB (Cloud Access Security Broker) and adaptive MFA (Multi-Factor Authentication) activating the Autonomous Security Engine (ASE) to take you beyond alert driven security and into real-time automated attack prevention.


Secure your entire organization from known, unknown & emerging email security threats - including email fraud.

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Protect users from web-borne malware, offensive or inappropriate content & improve productivity.

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Discover, analyze, secure & manage user interaction with cloud applications - inline & using APIs.

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Reduce impact of large scale data breaches by protecting user accounts with more than just passwords.

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Pioneering ASE technology

Autonomous Security Engine

Connecting your entire security product suite so it evolves and reacts automatically to a changing threat landscape.

Learn more about ASE

ASE provides 24x7 security so you don’t need to


Full access to threat intelligence without the cost


Integral part of the Censornet platform

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