SpamDuster inspects every incoming message — content, links and attachments — and stops spam, malware and phishing before it reaches the inbox. The same protection runs in SpamDuster Cloud and on the On-Premise Inbound appliance. Here's everything it does.
Adaptive scoring, reputation checks and greylisting stop unwanted bulk mail before it reaches the inbox — and learns from what your users mark.
Every message and attachment is scanned for viruses and malware, including threats hidden inside archives and disguised files.
Catches credential-stealing and impersonation attempts that pass basic authentication, by inspecting message content and links.
Every attachment is examined — including files disguised by extension and payloads concealed inside password-protected or nested archives.
SPF, DKIM and DMARC validation on inbound mail to verify senders really are who they claim to be.
Blocked and suspicious mail is held safely in quarantine, where it can be reviewed and released — nothing is silently lost.
Per-user and per-domain whitelists and blacklists give fine-grained control over exactly which senders get through.
A clear dashboard shows mail volume, catch rates and top blocked senders, so you always know what the filter is stopping.
Threat signatures and rules refresh continuously in the background — new scams are caught without you lifting a finger.
Need to filter the mail your servers send? SpamDuster On-Premise Outbound — coming soon — scans outgoing mail for spam, viruses and phishing before it leaves your network. Learn more →
A simple portal lets every user handle their own filtering — cutting the support tickets that land on your desk.
Users review their own quarantine and know nothing legitimate slipped through.
A false positive? Release it straight to the inbox — no admin required.
Every correction trains the filter, so it gets sharper for that mailbox over time.
Users keep their own whitelists and blacklists — you set the policy, they fine-tune it.
Start with SpamDuster Cloud on Linode in minutes, or run it on your own servers.
