Email Filtering and Protection

Block the Threats Before Your Team Ever Sees Them

Phishing attacks, malicious attachments and spam are a constant presence in every business inbox. Our managed email filtering service sits in front of your email environment, analysing every inbound message and blocking harmful content before it reaches your team.

One Click Is All It Takes

The majority of cyberattacks begin with an email. Attackers invest significant effort into crafting messages that look legitimate, mimicking real suppliers, colleagues or service providers with alarming accuracy.

For businesses without robust email filtering in place, every email that arrives is an unscreened risk. Staff are expected to make security judgements on dozens or hundreds of messages every day, which is neither realistic nor fair.

Managed email filtering removes the vast majority of threats before your team ever encounters them. Phishing attempts, malware laden attachments, spoofed sender addresses and bulk spam are all identified and blocked automatically.

Industry-wide data from the last 18 months

46-47% of all email traffic worldwide is spam
144M malicious email attachments encountered in 2025 alone
15% growth in malicious email attacks in 2025

Advanced Phishing Detection

Modern phishing attempts go far beyond obvious spam. Our filtering analyses message content, sender behaviour and link destinations to identify sophisticated phishing attacks that basic filters would miss entirely.

Attachment and Link Scanning

Malicious files and dangerous links are two of the most common ways attackers deliver malware. Every attachment and URL in inbound emails is checked before delivery.

Managed and Fine-Tuned for Your Business

We configure and manage your filtering settings to suit the way your business operates, adjusting the configuration as your email environment evolves.

Protection That Learns as Threats Evolve

Email threats are not static. At AOIT, we do not just set up email filtering and walk away. We monitor how your filtering is performing, stay current with the latest threat intelligence and adjust your configuration accordingly.

Our partners benefit from a properly managed filtering setup that balances strong protection with clean deliverability.

About Us

What Our Partners Say

Kings Church Gateshead

Unparalleled Customer Service

As a charity it was of great importance to us that we had customer support in regards to the choice of services. AOIT Networks have gone above and beyond to ensure a seamless hosting, service transfer and guidance along the way. In addition to services we applied for through AOIT, they advised we applied for a Microsoft 365 NonProfit license, then aided the set up and provided training to our administration.

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Smashdown Consultants

There to help even if you're not sure what to do!

AOIT are always there to help, even when I wasn't sure what the solution is! A few weeks ago, I tried to call a contact. The outbound call didn't work, so I dropped them a text, and they were unable to reach me either. Having worked with Andrew a few times previously, I decided to get in touch with him, even though it was none of his equipment causing issues.

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Real Reviews From Real Partners

  • Every review here is unedited, pulled directly from Trustpilot
  • From real AOIT clients across the UK, not hand-picked quotes
  • Good or bad, it's all there, because that's the point of transparency
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Frequently Asked Questions

Email filtering sits between the internet and your inbox, analysing every inbound message before it is delivered. Messages showing signs of phishing, malicious attachments or spam are blocked or quarantined.

No filtering solution catches one hundred percent of threats. However, a well-configured managed filtering service blocks the vast majority of malicious emails and significantly reduces the risk of a successful attack.

Blocked emails are typically quarantined rather than permanently deleted. You or your team can review quarantined messages and release any that have been incorrectly flagged.

In practice, the impact on delivery speed is negligible. Modern filtering solutions are designed to process messages quickly.

Most email filtering solutions focus primarily on inbound external email, which is where the vast majority of threats originate. For internal email, other security controls play a more significant role.

Yes. Our email filtering solutions are compatible with the major business email platforms. We will confirm compatibility during the initial assessment.

Business email compromise attacks are different from typical phishing. They often contain no malicious link or attachment, just a convincing message asking for a payment or a change of bank details, so a standard filter has little to catch. Our filtering adds impersonation checks that flag look-alike domains and unusual sending patterns, but the most effective protection is a verification step outside of email, such as a phone call on a number you already have, before acting on any request to change payment details.

How Much Harmful Email Is Getting Through to Your Team Right Now?

Without proper filtering in place, the answer might surprise you. Get in touch and we will take a look at your current email setup and put together a filtering solution that keeps your business properly protected.

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