Any SMTP server
Your MX points at Postwarden; we filter the mail and hand it to your own server — Microsoft 365, Google Workspace, Exchange Server, Postfix or anything else that speaks SMTP — with the TLS requirement you choose for each domain.
Postwarden is a secure email gateway that filters your mail in the EU and works in front of the mail system you already have — Microsoft 365, Google Workspace, Exchange Server or any SMTP server. On Microsoft 365? 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 Microsoft 365 tenant — free, read-onlyAnother mail system? Check any domain — no sign-in
You approve a read-only permission for your tenant. No password reaches us.
We analyse the last 14 days and show you what got delivered that should not have. Message content is never stored — findings only.
The permission lives in your Entra portal under Enterprise applications. Remove it whenever you like; nothing of yours stays behind.
Whatever runs your mail, see which system receives it and whether someone could send mail with your exact address in the From line. The check reads public DNS records only — SPF, DMARC, DKIM, MTA-STS and TLS reporting — and explains what it finds in plain words.
Your MX points at Postwarden; we filter the mail and hand it to your own server — Microsoft 365, Google Workspace, Exchange Server, Postfix or anything else that speaks SMTP — with the TLS requirement you choose for each domain.
Connect your directory to keep the list of recipients in step, and remove a phishing message from your users' mailboxes after it was delivered.
Add addresses by hand or from a CSV file, sync them from Microsoft 365 or Google Workspace, or have each one checked live against your own server.
Step-by-step set-up for each mail system: accept mail only from Postwarden, send our spam verdict to the junk folder, and optionally send outbound mail through us.
Mail is filtered on our servers in Falkenstein and Helsinki, and stored in EU-jurisdiction storage, encrypted with keys we hold for each customer. The privacy policy lists every provider involved.
One published price per mailbox per month. No quote process, no three-year lock-in, no per-feature upsell.
Built for the size of ICT team a council or a school actually has, not for a dedicated security operations centre.
Comparison uses published list pricing for a mid-market secure email gateway. Your negotiated price may differ.