Validating 1M emails per month with common SaaS providers can cost more than a senior infra budget line.
Self-hosted email validation engine
Validate unlimited emails. Pay once. Keep every list on your server.
MXGuard replaces per-email validation SaaS with a production-grade engine you own: web UI, bulk CSV jobs, SMTP verification nodes, proxy rotation, canary monitoring, and automatic updates.
$7,999
one-time license
Save up to $25K/mo
versus per-email SaaS
5 min
scripted install
Validation throughput
1,284,902
All systems healthy
Deliverable
72.4%
Risky
9.7%
Blocked
17.9%
enterprise-leads-q2.csv
643,120 of 912,000 checked
$ chmod +x setup.sh && sudo bash setup.sh
license accepted · caddy issued certificate · admin created
The expensive part is not validation. It is renting it forever.
SaaS validation gets punished by scale.
Client lists leave your infrastructure, creating privacy, GDPR, and data sovereignty review cycles.
Large jobs crawl through vendor queues while your campaign calendar waits for someone else's API.
The MXGuard model
Install once. Validate through infrastructure you control.
MXGuard combines the validation techniques buyers expect from major SaaS platforms with the operational controls technical teams need in production.
01
Provision a VPS
Ubuntu 22.04+, 4GB RAM, your domain, and any provider you already trust.
02
Run the installer
Docker, database, gateway, HTTPS, license activation, and admin account are handled automatically.
03
Start validating
Use the web UI, CSV bulk jobs, or REST API. Add MX, SMTP, and proxy nodes as volume grows.
ROI calculator
See when MXGuard pays for itself.
Move the monthly validation volume and compare SaaS spend against a perpetual MXGuard license plus estimated infrastructure.
Estimated monthly SaaS spend
$6,500
MXGuard license
$7,999
Infra estimate
$60/mo
Estimated payback
2 months
Production controls
Built for teams that validate serious volume.
Validation depth
Syntax, MX lookup, DKIM selectors, disposable domains, SMTP handshake, catch-all detection, role accounts, and provider-specific intelligence.
Bulk jobs
Upload large lists, watch progress, track speed, and download enriched results.
REST API
Validate signups, CRM records, and internal workflows programmatically.
Proxy pool
SOCKS5 rotation, reputation badges, blacklist monitoring, and IP performance tracking.
Self-healing operations
Provider throttling, IP warming, circuit breakers, stuck-job recovery, node health checks, Telegram alerts, and canary validation for known-good inboxes.
Validation result
Every address gets an operationally useful verdict.
{
"status": "deliverable",
"confidence": 98,
"reason": "smtp_deliverable",
"provider": "Google Workspace"
}
deliverable
undeliverable
risky
accept-all
disposable
unknown
Competitive landscape
MXGuard changes the buying model.
Capability
SaaS validators
Other
MXGuard
PricingPer email$99/moOne-time $7,999
Data locationTheir serversYour serverYour server
Bulk validationTiered and rate-limitedLimitedFull CSV workflow
Infrastructure controlNoneSingle nodeDistributed nodes
MonitoringVendor-ownedMinimalHealth, canaries, Telegram
Simple pricing
$7,999 one-time
Perpetual license, unlimited validations, all future updates, and installer scripts for core, MX, SMTP, and proxy nodes.
- Automatic Docker updates via Watchtower
- Setup documentation and IP warming guide
- Admin dashboard, API access, and bulk validation
- No per-email fees, subscriptions, or vendor lock-in
FAQ
Questions technical buyers ask first.
What server do I need?
A main Ubuntu 22.04+ VPS with 4GB RAM is enough to start. Add MX, SMTP, and proxy nodes as volume grows.
Does email data leave our server?
No. Validation happens inside your infrastructure. MXGuard is designed for GDPR-sensitive and sovereignty-conscious teams.
Can we validate through an API?
Yes. MXGuard includes REST API access for signups, CRMs, data pipelines, and internal tools.
How do updates work?
Watchtower checks the private Docker image every 24 hours and applies new releases automatically.
Ready to own your email validation?
Stop sending your lists to someone else's API. Run MXGuard on your server and validate at your pace.