Email Security

Ultra-modern multi-layered email security solutions for your entire organisation from known, unknown and emerging email security threats. Stop large-scale phishing, targeted attacks, impersonation fraud and malware in their tracks with a comprehensive, cloud email security solution.

Unparalleled Email Security Threat Protection

Email Security 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 Impersonation Fraud in its Tracks

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

How Censornet Email Security 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 of Email Security

Algorithm 10,000+ algorithms

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

Layered Multi-layered threat protection

A unique combination of technologies.

Scan LinkScan™

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

Filter Outbound email 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

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Email Security visual rule builder

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Email Security message rules showing categorisation 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, optimise storage costs, and 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 SecureMail is an add-on to Email Security and provides a simple, yet effective, solution for user-based encryption of specific messages.

Adding a customisable 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.

SecureMail 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 organisations 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 organisations 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 organisation’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 API 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.

Add an extra layer of enhanced protection to Email Security.

The optional Advanced Email Sandbox protects against today’s evasive zero-day threats by providing a highly scalable and powerful environment to run in-depth, sophisticated analysis of unknown or suspicious programs and files.

The Advanced Email Sandbox service adds a powerful layer of protection to Email Security, alongside multiple tier-1 signature and behaviour-based antivirus (AV) engines. The Sandbox service analyses suspicious files in depth, detonates payloads in a contained virtual environment, scrutinises their behaviour, and identifies malicious intent.

Sandbox technology provides advanced threat protection and zero-day exploit detection by:

  • Leveraging purpose-built, advanced machine learning algorithms, aggressive behaviour analysis, anti-evasion techniques and memory snapshot comparison to detect threats
  • Helping uncover malicious files including polymorphic and other threats designed for undetectable targeted attacks
  • Fully integrating within Censornet Email Security for analysis of email file attachments with support for a broad range of file types.

Censornet’s Advanced Email Sandbox is a cost-effective sandbox solution for protection that goes above and beyond that provided by standard antivirus engines.

What our customers say

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“While we are all away from the office, the ability to easily measure productivity from the Censornet dashboard is great. This also means we are able to audit outgoing communications to ensure no information is leaving the business that shouldn’t, and follow up if any suspicious requests are made. From an inbox perspective this means the correct categorisation of emails, and a huge reduction in spam making it to employees, which is great news for our staff who can now actually trust what’s coming in. LinkScan™ is something we didn’t have before and it has been a massive success for us.”

Mayur Mistry, Head of IT Operations Fever-Tree

“I was tasked with ensuring cohesion over the group’s systems and knew this had to apply to our security tools – to ensure we were universally protected across the group. While Microsoft has basic security functionality, we needed more sophisticated security tools to protect our employees, but also at the right price. Censornet gives us advanced security and also has a far more personal and specialised security service”

Julian Daniel, Head of IT, Hallmark Hotels

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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 organisations.

Virus Protection


Spam Detection


SLA Delivery


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