Resources
Everything else worth reading
The deeper material, in one place: how mail actually moves through the gateway, what the price covers, how the service is secured and validated, and where the product's own documentation lives.
By platform and by topic
The same product, answered from wherever you are starting.
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Feature status
Every capability with its current status: generally available, beta, beta testing, requiring setup, or not built.
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Evaluation guide
Evaluating the gateway on your own mail: a one-domain checklist, prerequisites, supported mail flows, Monitor Mode, verdict review, enforcement and rollback.
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Investigating a disputed verdict
A held invoice or a phish that got through: the steps, two worked examples, and a reply you can send the customer.
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Release notes
What changed in each release, written for the people who run the service.
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Microsoft 365
What changes when the gateway goes in front of Exchange Online, the two settings most deployments get wrong, and why Defender stays on.
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Google Workspace
The inbound gateway setting that decides whether it works, and exactly what the Google APIs are and are not used for.
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Sample domain reputation report
A complete report for a fictional domain: the score and what reduces it, blocklists, receivers' DMARC reports, mail-security DNS, and the exact records to publish.
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SPF, DKIM and DMARC
Authentication checked on every message, your own aggregate reports parsed on arrival, and a proposed next record with the senders it would break.
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QR code phishing
Why text filters miss quishing, what actually scores, and why the decoded destination is recorded even when nothing does.
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Email continuity
Five days of queued mail instead of bounces, visible and readable per domain — and exactly where its scope ends.
Understanding the product
Security capabilities
Every filtering stage: what it does, when it runs, what data it uses, how it affects the score, and whether it can be turned off per domain.
Architecture
How mail actually flows, which integrations carry mail and which do not, and what deployment involves.
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How it works
One message end to end — the MX handover, the scanning stages, and the weighted decision behind delivery or quarantine.
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What you get
What the per-domain price covers, what onboarding looks like, and what is billed by someone else.
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Architecture
Mail path, engine categories, data flow, tenant isolation, logging and retention.
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Security and data handling
Where your mail travels, what is stored and for how long, tenant isolation, and who can reach the data.
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Trust Center
The questionnaire answers in one place, including certification status, who else can see any part of your data, and how backups are restore-tested.
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How we validate filtering health
Continuous checks on mail flow, routing, DNS dependencies and the scanning services that are supposed to be running.
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Why MailThreatZero?
Why MSPs consider it alongside the email security they already have, a worked example, and when another approach fits better.
Inside the product
Product documentation and the full version history are maintained in the console itself, alongside the release they describe, rather than copied onto this site where they would drift.
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Product documentation
Walkthroughs of every screen, written against the running product.
In the console under Documentation. Sign-in required.
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Version history
Every release, what changed in it, and when — including the reasoning behind the decisions, not just the list of changes.
In the console under Changelog. Sign-in required.
No account yet? Request a Demo and we will walk you through both.