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Email Monitoring

See the threats already in your inbox.

Sophos Email Monitoring sits behind Microsoft 365 and Google Workspace via API. It catches the business-email compromise, impersonation, payroll-fraud, and supply-chain attacks that get past your primary email security - and lets users report suspicious mail with one click.

Key Capabilities

What pre-delivery filtering misses

Even the best email gateway lets a small fraction of threats through, especially the no-payload social-engineering ones. Email Monitoring catches what slips through - inside the inbox, where most modern attacks now live.

API-based deployment

Connects to Microsoft 365 or Google Workspace via Graph API. No MX-record changes, no mail-flow rules, no journaling complexity. Deploy in minutes, not weeks.

AI-based BEC detection

Machine-learning models detect business-email-compromise patterns: tone, urgency, payment-redirect language, executive impersonation, abnormal communication patterns.

Impersonation detection

Catches display-name spoofing, look-alike domains, and homoglyph attacks (CEO@compaĞ¿y.com - that’s a Cyrillic “n”). Built-in directory and contact awareness keeps false positives low.

Vendor / supply-chain detection

Spots the “your vendor has been compromised” pattern: legitimate sender, hijacked thread, surprise payment-redirect or password-reset request. The hardest category to filter pre-delivery.

One-click report-phish button

Outlook and Gmail add-ins give users a single button to report suspicious mail. Reports feed back into detection models, train the AI, and trigger automatic remediation across the tenant.

Native XDR integration

Email detections appear inside Sophos XDR cases alongside endpoint, network, identity, and cloud events. Investigators see the full attack chain - including the email lure that started it.

Deep Dive

When pre-delivery filtering isn’t enough

Traditional email security gateways inspect mail before delivery. That works great for known-bad senders, attachments with malware signatures, and obviously-bad URLs. It works less well for the kind of attack a finance team actually loses money to.

  • No-payload BEC. A short, professional email from a real-looking executive asking finance to wire money. No attachment, no URL, no signature. Pre-delivery filters see nothing to block.
  • Hijacked-thread attacks. The attacker compromises a real vendor’s mailbox and replies to a real thread. The sender is legitimate, the conversation is real, only the payment instructions are new.
  • Time-delayed weaponization. The email arrives with a benign-looking URL. After delivery, the URL flips to malicious. Pre-delivery sandbox saw nothing wrong.
  • Email Monitoring catches all of these. Continuous post-delivery analysis, AI-based context awareness, and one-click user reporting close the gap your primary email security can’t close on its own.
From: ceo@your-company.com Subject: Quick request Pre-delivery gateway: passed No URLs, no attachments, no signatures Email Monitoring flagged: - Display name spoof (CEO impersonation) - No prior conversation with this recipient
Who Deploys It

Built for the inbox that’s already mostly cloud

Email Monitoring assumes your primary mail is Microsoft 365 or Google Workspace, and adds a layer on top. These are the three patterns we see customers deploy it in.

1

M365 / Google Workspace organizations

API-based deployment hooks straight into your tenant. No MX changes, no mail flow rules, no impact on existing tools. Most organizations are protecting their inboxes within an afternoon.

Deployed in an afternoon
2

Existing email security stack

You already have Sophos Email (or another email gateway) and want a deeper layer for the threats that always slip through. Email Monitoring sits behind it as the inbox-level second line of defense.

Adds depth, not duplication
3

Compliance & audit visibility

Need a documented record of inbox-level threat visibility, user-reported phish, and remediation actions for SOC 2 / HIPAA / cyber-insurance? Email Monitoring produces the audit trail.

Audit-friendly inbox record
Pairs Well With

Layered email defense

Email Monitoring works best as a complement to pre-delivery filtering and user awareness training - not as a replacement for either.

Sophos Email and Phishing Protection
Pre-delivery

Email & Phishing Protection

Sophos’s primary email security: AI-powered filtering at the gateway level. Most threats get filtered here before they ever reach a user.

Sophos Phish Threat
Awareness

Phish Threat

User awareness training that teaches your team to spot what gets through. Realistic simulations, bite-sized training modules, and the same one-click report button.

Sophos Workspace Protection
Bundle

Workspace Protection

Email Monitoring is included in the Workspace Protection bundle, alongside Endpoint, Mobile, ZTNA, Protected Browser, and DNS Protection. One per-user license.

Ready to add inbox-level visibility?

Request per-user pricing for Email Monitoring, or talk to our team about layering it with your existing email security stack.