See what your current email filter let through.

Postwarden is a secure email gateway for Microsoft 365, hosted in the UK and EU. Before you change a single DNS record, run a free read-only scan of the last 14 days and see the phishing, spoofing and lookalike domains that reached your users' inboxes.

Scan my tenant — free, read-only

How the scan works

  1. Sign in with Microsoft

    You approve a read-only permission for your tenant. No password reaches us.

  2. We read headers, not your mail

    We analyse the last 14 days and show you what got delivered that should not have. Message content is never stored — findings only.

  3. Revoke in one click

    The permission lives in your Entra portal under Enterprise applications. Remove it whenever you like; nothing of yours stays behind.

Why Postwarden

UK and EU residency by construction

Mail is processed on servers in Falkenstein and Helsinki and stored in an EU-jurisdiction bucket. Not a policy setting — the only place the data can be.

Transparent per-mailbox pricing

One published price per mailbox per month. No quote process, no three-year lock-in, no per-feature upsell.

An admin panel two people can run

Built for the size of ICT team a council or a school actually has, not for a dedicated security operations centre.

What it costs

Postwarden: per month

Typical enterprise gateway at list price: per month

Comparison uses published list pricing for a mid-market secure email gateway. Your negotiated price may differ.

Handling your data