Nexus Open Systems Ltd

Nexus Managed Email Security Services

Nexus partner with the best of breed in Cloud Security to deliver a fully Managed Email Security Service. This gives you a critical defence to protect against advanced threats and data loss. With our comprehensive enterprise-grade email protection, you and your organisation can breathe easier.


  • Advanced Threat protection for your organisation
  • Anti-Phishing protection for your users
  • AI for Real-Time Spear Phishing & Cyber Fraud Defence
  • Malware Protection & Spam Filtering
  • Link Protection & Typosquatting protection
  • Block Email-Borne Viruses
  • Denial of Service (DOS) Attack Prevention
  • Secure Communication with Email Encryption
  • Data Leak Protection
  • Ongoing 8-6 Support


  • Complete, simple and affordable protection for business emails
  • Award winning email security with tamper proof email archives
  • Powered by global 24x7 threat operations centre
  • Scalable cloud and prioritised filtering technology
  • 100% cloud based, no hardware or software or updates
  • Spam and multi layered malware protection
  • Simple per user cost model
  • No set up or upfront costs
  • No hardware or software to buy or maintain
  • Multi-layered security services help with GDPR compliance


£3 per user per month

  • Education pricing available
  • Free trial available

Service documents


G-Cloud 11

Service ID

2 6 8 7 6 6 8 6 8 0 0 2 8 7 3


Nexus Open Systems Ltd

Chris Goodwill

01392 205095

Service scope

Service scope
Software add-on or extension No
Cloud deployment model
  • Public cloud
  • Private cloud
  • Hybrid cloud
Service constraints Our service is designed based upon the end users environment including the size of their organisation and internet connection to ensure the service can operate optimally.

Onsite consultancy is required to implement the service based upon the end users specific requirements and security policies.
System requirements Use Office 365, Gmail or Exchange email solutions

User support

User support
Email or online ticketing support Email or online ticketing
Support response times Standard SLA is for 2 hours response for Critical issues; 4 hours response for Major issues and 8 hours response for Minor issues.
User can manage status and priority of support tickets Yes
Online ticketing support accessibility None or don’t know
Phone support Yes
Phone support availability 9 to 5 (UK time), Monday to Friday
Web chat support Web chat
Web chat support availability 9 to 5 (UK time), Monday to Friday
Web chat support accessibility standard None or don’t know
How the web chat support is accessible Users can interact with our Technical, Sales and Training teams. Raising questions which are dealt with there and then. Alternatively we will take enquiries away and respond direct to users through email.
Web chat accessibility testing None as yet
Onsite support Yes, at extra cost
Support levels Pricing: No Set-up Costs; No Annual Upgrade or Re-licencing Costs; Simple Pricing Model - Support: Ongoing 8-6 Support; Email-borne Virus Protection; Spam Protection; Email Based Malware Protection; Advanced Threat Detection - Dedicated Account Manager
Support available to third parties Yes

Onboarding and offboarding

Onboarding and offboarding
Getting started We follow a defined process for on-boarding new clients to ensure that they have the assurance of our help, whilst at the same time remain in control of the cloud services which are often at the core of their business. Through the on-boarding process Nexus will complete a detailed assessment of: • Client’s strategic vision • Organisational culture • Current and future objectives • Desire business outcomes • Potential improvements to existing business processes • Project and programme delivery resources • Current governance and programmes. We can provide onsite training to our clients as well as instruction at our own training centre. User documentation is provided by way of client portal guide
Service documentation No
End-of-contract data extraction The customer can extract their data in PST format, which is something that the professional services team will assist with, during the contract expiry period.
End-of-contract process Should the customer decide not to renew the contract once the initial agreement has ended our in-house professional services team will assist the customer redirect their MX records and retrieve their data OR assist the new supplier in extracting the data into the new solution. This is included in the overall price of the solution as a remote service.

Using the service

Using the service
Web browser interface Yes
Supported browsers
  • Internet Explorer 11
  • Microsoft Edge
  • Firefox
  • Chrome
  • Safari 9+
Application to install No
Designed for use on mobile devices Yes
Differences between the mobile and desktop service None
Service interface Yes
Description of service interface Application client and web browser
Accessibility standards WCAG 2.1 A
Accessibility testing Barracuda strives to make products that are accessible to users with disabilities.
Customisation available Yes
Description of customisation Users can customise the user interface to enable the real-time reporting element to be more effective. There are also many elements in the solution which can be customised, including Spam Scoring, Quarantine and Attachment analysis


Independence of resources The currently is designed as a global resource and has therefore been designed to accommodate a significant number of users. As a fully cloud based application the resource at the infrastructure level has been created by Barracuda and does not have any restrictions on individual users.


Service usage metrics Yes
Metrics types User on the system
Spam & Virus email results (How many blocked)
Reporting types
  • Real-time dashboards
  • Regular reports
  • Reports on request


Supplier type Reseller providing extra support
Organisation whose services are being resold Barracuda

Staff security

Staff security
Staff security clearance Conforms to BS7858:2012
Government security clearance Up to Security Clearance (SC)

Asset protection

Asset protection
Knowledge of data storage and processing locations Yes
Data storage and processing locations
  • United Kingdom
  • European Economic Area (EEA)
  • EU-US Privacy Shield agreement locations
  • Other locations
User control over data storage and processing locations Yes
Datacentre security standards Supplier-defined controls
Penetration testing frequency At least every 6 months
Penetration testing approach ‘IT Health Check’ performed by a Tigerscheme qualified provider or a CREST-approved service provider
Protecting data at rest
  • Physical access control, complying with CSA CCM v3.0
  • Physical access control, complying with SSAE-16 / ISAE 3402
  • Physical access control, complying with another standard
  • Encryption of all physical media
Data sanitisation process No
Equipment disposal approach A third-party destruction service

Data importing and exporting

Data importing and exporting
Data export approach If required this would be through the .pst format
Data export formats Other
Other data export formats .pst file
Data import formats Other
Other data import formats .pst file

Data-in-transit protection

Data-in-transit protection
Data protection between buyer and supplier networks
  • Private network or public sector network
  • TLS (version 1.2 or above)
Data protection within supplier network TLS (version 1.2 or above)

Availability and resilience

Availability and resilience
Guaranteed availability Barracuda do not offer SLA's on any solutions
Approach to resilience Barracuda use a dual data centre configuration, with internal built in resilience in both data centres.
The data centre includes the latest in data centre technology, benefitting from Rittal cold aisle containment pods, advanced building management systems, carrier grade Cisco ASR9000 routers and Cisco Nexus 7000 switches, Riello/Perkins generators (N+1) and Weatherite BTR45EC air handling units. Our systems monitor over 200 metrics - everything you'd expect from a next generation data centre and much more.
Outage reporting Through the customers user interface, Barracuda online campus and also via email.

Identity and authentication

Identity and authentication
User authentication needed Yes
User authentication
  • 2-factor authentication
  • Username or password
Access restrictions in management interfaces and support channels Access management controls are available through the portal with admin users enabling additional controls for other areas. As the service will only need to be accessed by the IT Admin team there is less of a requirment to give end users access.
Access restriction testing frequency At least every 6 months
Management access authentication
  • 2-factor authentication
  • Username or password

Audit information for users

Audit information for users
Access to user activity audit information Users have access to real-time audit information
How long user audit data is stored for At least 12 months
Access to supplier activity audit information Users have access to real-time audit information
How long supplier audit data is stored for At least 12 months
How long system logs are stored for At least 12 months

Standards and certifications

Standards and certifications
ISO/IEC 27001 certification No
ISO 28000:2007 certification No
CSA STAR certification No
PCI certification No
Other security certifications No

Security governance

Security governance
Named board-level person responsible for service security Yes
Security governance certified Yes
Security governance standards ISO/IEC 27001
Information security policies and processes Barracuda uses a defense-in-depth strategy and proprietary hardened software and operating systems to protect data and services. Barracuda conducts regular inspections to ensure the security of its systems.

Operational security

Operational security
Configuration and change management standard Supplier-defined controls
Configuration and change management approach Available upon request
Vulnerability management type Supplier-defined controls
Vulnerability management approach Available upon request
Protective monitoring type Supplier-defined controls
Protective monitoring approach Available upon request
Incident management type Supplier-defined controls
Incident management approach Available upon request

Secure development

Secure development
Approach to secure software development best practice Supplier-defined process

Public sector networks

Public sector networks
Connection to public sector networks No


Price £3 per user per month
Discount for educational organisations Yes
Free trial available Yes
Description of free trial Barracuda offer free of charge 30 days evaluations for unlimited users

Service documents

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