Administrator Guide — NetCell MailGuard¶
NetCell MailGuard (nmg) is an SMTP security gateway distributed as a Debian package (Bookworm, amd64 + arm64). It is built on Postfix, rspamd, ClamAV, and a YARA sandbox, with active-active cluster support.
Contents¶
| Section | Description |
|---|---|
| Installation | System requirements, installation, initial setup |
| Dashboard | System overview, threat radar, traffic metrics |
| Domains & Routing | Managing mail domains, transport routes, DKIM |
| Mail Configuration | Postfix parameters, TLS, thresholds, all filter options |
| Quarantine | Managing the quarantine queue — release, reject, allow-list |
| Mail Queue | Monitor and control the active mail queue |
| Mail Logs & Trace | Search logs, trace a message through all Postfix hops |
| Filters & Rules | Sender filters, RBL, composites, phishing feeds, TLDs |
| Sandbox | YARA analysis of attachments and URLs |
| Security Alerts | IOC monitor, outbound guard, retroscan |
| DMARC | Evaluating DMARC aggregate reports |
| Firewall | Managing IP access rules |
| Bayes Training | Spam and ham training, spam bursts, analytics |
| Reporting | Traffic statistics and reports |
| Cluster | Adding/removing nodes, cluster health |
| Users & Roles | Managing admin users and API keys |
| Settings | License, TLS, branding, auto-update, backup |
| Privacy (GDPR) | Archiving rules, compliance |