Illustrative product stack

Email Security & Anti-Phishing Stack

Email remains a common route for credential theft, invoice fraud, impersonation and malware delivery. Native Microsoft 365 or Google Workspace protection can form a baseline, but configuration, licensing and business processes determine what is covered.

This page shows possible product roles and alternatives, not a fixed bill of materials. Final selection depends on your existing infrastructure, risk profile, budget, licences, technical requirements and compatibility.

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The business problem

Why this security area matters

A practical email stack combines platform controls, domain authentication, account protection, reporting and verification procedures. Additional filtering may help where an assessed gap remains; overlapping gateways can add delivery complexity and should not be installed without need.

How organisations become exposed

Unreviewed forwarding rules, incomplete SPF/DKIM/DMARC, broad mailbox access, weak MFA and payment changes approved only by email can leave businesses exposed. Filters cannot stop every message or replace independent verification.

Who should consider this stack?

UK organisations using Microsoft 365 or Google Workspace, particularly finance and professional services, organisations handling confidential documents, and teams facing invoice impersonation or mailbox compromise.

How to compare options

• Compatibility with existing infrastructure and licences.
• Security requirements, coverage and integration needs.
• Operational overhead, alert ownership and support requirements.
• Implementation effort and budget, confirmed in a tailored proposal.

Inside the stack

Possible components and their roles

A candidate configuration for discussion. Core options, alternatives and optional layers are labelled so competing products are not presented as a default bundle.

Layer 01core option

Microsoft

Microsoft Defender for Office 365

Email and collaboration protection

Vendor info reviewed 2026-10-28

Official product information ↗

Role

Potential native Microsoft 365 layer for phishing, malicious links and attachments, subject to plan and configuration.

How it fits & relationship

Assess existing plan first; it may meet some needs without a separate gateway.

Technology ecosystem; no partner authorisation claimed

Product names checked against the vendor's site on 2026-10-28. Availability subject to vendor licensing, region and terms; contact AOS to confirm current options.

Layer 02alternative

Check Point

Check Point email security

Email security

Vendor info reviewed 2026-10-28

Official product information ↗

Role

Authorised partner option for email and collaboration protection layered over Microsoft 365 and Google Workspace.

How it fits & relationship

May complement the existing mail service; mail-flow and API architecture are verified before deployment.

Authorised UK Check Point partner

Product names checked against the vendor's site on 2026-10-28. Availability subject to vendor licensing, region and terms; contact AOS to confirm current options.

Layer 03alternative

Barracuda

Barracuda Email Protection

Email security

Vendor info reviewed 2026-10-28

Official product information ↗

Role

Potential alternative email protection category in the current ecosystem.

How it fits & relationship

Evaluate as an alternative or targeted add-on, only after confirming product fit and availability.

Technology ecosystem; no partner authorisation claimed

Product names checked against the vendor's site on 2026-10-28. Availability subject to vendor licensing, region and terms; contact AOS to confirm current options.

Layer 04alternative

TitanHQ

SpamTitan / PhishTitan

Email filtering and phishing protection

Vendor info reviewed

Official product information ↗

Role

Potential email and phishing protection options in the ecosystem.

How it fits & relationship

Evaluate against native protections and avoid duplicate mail gateways without a clear need.

Technology ecosystem; specific product availability and AOS delivery scope must be confirmed.

Product names checked against the vendor's site on . Availability subject to vendor licensing, region and terms; contact AOS to confirm current options.

Layer 05core option

Google

Google Workspace security controls

Email and collaboration security

Vendor info reviewed

Official product information ↗

Role

Baseline controls for organisations using Google Workspace.

How it fits & relationship

Review existing configuration and authentication before adding external layers.

Third-party platform option; no AOS partner relationship claimed.

Product names checked against the vendor's site on . Availability subject to vendor licensing, region and terms; contact AOS to confirm current options.

How the stack works together

From visibility to continuous improvement

01Review mail platform, current licensing, mail flow, domains and current security policies.
02Improve domain authentication using SPF, DKIM and DMARC as appropriate.
03Select the existing platform controls or one additional protection layer for the identified gap.
04Protect accounts with MFA and review forwarding, admin access and sign-in activity.
05Make suspicious-message reporting and payment verification straightforward.

Example architecture to assess

Start with the controls already licensed in Microsoft 365 or Google Workspace and confirm their configuration. Add one supplementary email security platform only if the threat model and mail flow justify it. Check Point, Barracuda and TitanHQ are technology options; exact product availability and compatibility must be verified.

Alternatives and optional layers

Microsoft Defender for Office 365, Check Point email security, Barracuda Email Protection and TitanHQ products are potential alternatives or complementary options. Proofpoint, Mimecast and Abnormal Security are not verified AOS offerings and are not presented as currently available.

How AOS can help

Advice, scope and delivery boundaries

AOS provides email security controls layered over Microsoft 365 and Google Workspace, including anti-phishing, business email compromise and malware protection. Domain changes, tenant access, coexistence, licence requirements and any ongoing management are scoped before delivery. Awareness training or phishing simulations are not assumed.

Questions & answers

Frequently asked questions

Does Microsoft 365 or Google Workspace already include email security?

Both provide security controls, with features depending on the service and licence. Review what is already active before choosing an additional layer.

Should we add two email security gateways?

Usually not without a specific documented need. Overlapping filtering can complicate mail flow and alert ownership.

Can SPF, DKIM and DMARC stop all spoofing?

They help authenticate mail claiming to come from your domains, but do not stop every impersonation or protect a compromised real account.

Related product stacks and services

Identity & privileged access →Endpoint protection & EDR/XDR →Data protection & loss prevention →Technology Partners →

Find the Right Security Stack for Your Business

Every organisation has a different security environment. Talk to AOS Technologiies about your requirements and explore a technology stack designed around your business.

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