Comprehensive email security for Microsoft Office 365

Gain a proven first layer of security for your internal mail servers. One that protects your network against volumetric attacks, and keeps your organisation productive. Along with email encryption designed for the strictest regulatory environments, to stop outbound communications falling into the wrong hands.
Stop spam & malware with inbound filtering
The larger your business, the larger your attack surface. This principle underpins our email gateway solutions, built for ensuring business continuity – even for high-volume and high-profile inboxes.
- Many people see spam as more of a nuisance than a real threat, but these persistent emails can pose serious danger to your organisation.
- Spam emails often have malicious intent and may even be used as the initial stage of a more serious attack – for example, as a way to deliver spyware or ransomware.
- Arrow’s Email Gateway filters and sanitises every email before it is delivered to your mail server, identifying spam or malicious emails and stopping them from reaching employee inboxes.
Outbound filtering for secure & trusted communications
Our outbound capabilities secure your emails before they leave your servers – while keeping your business productive. Proven solutions for protecting business data, maintaining brand reputations, and complying with GDPR. The choice for leading UK companies.
- Our email gateway’s outbound filtering solution prevents you being put on spam block lists, and stops outbound attacks from inside your network.
- Email encryption ensures only your intended recipients can access outbound emails and attachments, preventing unauthorised access to sensitive data.
- With 500,000+ users, we continually collect intelligence to develop and adapt the latest outbound (and inbound) filtering solutions.


Ensure email continuity & minimise interruption
The Email Continuity Service ensures that email operations continue by failing over to a cloud-based, email service, in the event primary email services become unavailable. During email server outages, an emergency mailbox allows users to continue sending, receiving, reading, and responding to email.
- Downtime can be extremely expensive, potentially leading to a drop in productivity, lost business opportunities, and a damaged reputation.
- Your end-users can still send, receive, compose and forward emails – even when email servers are unavailable.
- The Email Gateway continuously checks mail server connections, beginning spooling immediately after determining that downtime has occurred. Email continuity begins 10 minutes later, enabling employees to quickly return to their tasks.
FAQs
It’s true that certain Microsoft 365 plans come with Exchange Online Protection and Compliance Center, which provides an initial layer of security. However, there are no native security features in Microsoft 365 designed to stop Business Email Compromise, social engineering, and spear phishing attacks.
With multi-layered email security solutions, additional layers such as AI-powered threat detection and incident response are built upon a more traditional secure email gateway (SEG). This significantly reduces an organisation’s risk of attackers bypassing their defences.
Microsoft 365 does have an inbuilt spam filter, but this unfortunately is not up to scratch to combat the tactics of today’s spammers. Secure Email Gateways may not be a new or ground-breaking solution, but they remain the best defence against inbound and outbound spam and malware.
Our advanced inbox defence is powered by a multi-layer AI engine that detects and blocks spear phishing and socially engineered attacks in real time and identifies which employees are at highest risk. This is done through machine learning and behavioural analysis, which allows the technology to understand the typical communication patterns of a company’s email environment and flag any anomalies as suspicious.
When an attack hits your inbox, it can spread throughout the rest of your company network surprisingly fast, causing mounting damage and increasing cost. Incident response solutions work to eliminate these malicious emails as quickly as possible before carrying out remediation actions to halt the overall attack’s progress and minimize damages.