Features

Everything you need, nothing you don't.

MxGuard ships with everything needed to run production email security — no extra modules, no add-on pricing. From customer self-service to threat intelligence feeds.

VERP-aware filtering

Recognises bulk-mailer envelopes structurally. No false positives on Mailchimp, Shopify, or other legitimate bulk senders.

Per-domain thresholds

Different sensitivity per domain or per user. Strict on accounts, lenient on marketing aliases.

Tag mode

Optionally deliver borderline mail with [SPAM] prefix instead of quarantining.

Allow / block rules

Recipient, domain, or global scope. Exact, wildcard, or CIDR matching. Hit tracking and last-hit timestamps.

Self-service domain add

Customers add their own domains, verify by DNS TXT record, and point MX. No support tickets needed.

Recipient verification

Optional probe to backend mail server. Reject unknown addresses at SMTP time, not after delivery.

ARC sealing

Preserves DKIM, SPF, and DMARC chain through forwarding. Compatible with mailing lists and aliases.

Prometheus metrics

Native /metrics endpoint. Per-domain verdict counters. Plug into Grafana or Datadog.

List-Unsubscribe

Mailing-list detection (📬) with one-click unsubscribe links in the digest. RFC 8058 supported.

Audit log

Every action recorded — releases, deletes, label changes, rule edits. Searchable, exportable.

Community forum

Built-in feature requests and bug reports. Track what's coming, vote on what matters.

30-day retention

Quarantined mail auto-deleted after 30 days by default. Configurable per deployment.

MIME subject decoding

RFC 2047 encoded-word headers decoded to readable text including emoji and non-Latin scripts.

Sender reputation tracking

Rolling 7-day spam/ham ratios per sender domain, kept in Redis for fast lookup.

Ham discount

Mark a sender as ham once; future mail from the registrable domain gets a score discount for 30 days.

Mobile-responsive UI

Full dashboard works on phone and tablet. Daily digest emails optimised for mobile inbox.

UK-hosted infrastructure

All processing and storage in the UK. GDPR-aligned by design.

Cloud-delivered

No hardware to deploy, no software to install. Set up via DNS in minutes.

Comparison

How MxGuard compares

A modern alternative to legacy stacks and overpriced enterprise suites.

Feature MxGuard eFa / SpamAssassin Enterprise suites
ML-based scoring
Sub-5ms per message
Transparent score breakdown
Customer self-service
Live feed dashboard
UK-hosted & supportedDepends
No capital investmentSometimes
SMB-friendly pricing

Ready to try it?

Free 30-day trial. No credit card required.