Cleanbox vs ImprovMX.
ImprovMX is a straightforward email forwarding service for custom domains. It supports catch-all addresses, SMTP sending, regex routing, webhooks, and multi-destination forwarding. Over 200,000 users trust it for simple domain email setup.
Feature comparison
| Feature |  Cleanbox |
ImprovMX |
|---|---|---|
| Email aliases | ||
| Spam filtering | ||
| Contact management | ||
| Custom domains | ||
| MX relay (gateway) | ||
| Virus scanning (ClamAV) | ||
| IP blacklist checking | ||
| Shield protection | ||
| Custom filter rules | ||
| Quarantine zone | ||
| Delivery scheduling | ||
| Rate limiting | ||
| One-click unsubscribe | ||
| Contact categories (20) | ||
| Cloud attachment storage | ||
| Team collaboration | ||
| REST API | ||
| Open source | ||
| Browser extension | ||
| Catch-all addresses | ||
| Free tier | 3 aliases, 50/week | 1 domain, 25 aliases, 500 emails/day |
| Paid from | $5/month | $9/month |
Where ImprovMX wins
- SMTP sending from your custom domain
- Catch-all and regex-based routing
- Webhook integration for developers
- Detailed delivery logs for troubleshooting
- Simple setup, works in minutes
Where Cleanbox wins
- Yes: spam filtering — forwards everything
- Yes: contact management
- Yes: Shield or scheduling features
- Yes: MX relay with virus scanning
- Yes: browser extension
Who should choose ImprovMX?
Users who want the simplest possible email forwarding on a custom domain with SMTP sending capability. No frills, reliable forwarding.
Who should choose Cleanbox?
Cleanbox is the better choice if you need spam filtering before delivery, contact management with 20 automatic categories and 5 contact states, Shield protection (rate limiting, delivery scheduling, gatekeeper), or MX relay for existing business email addresses with virus scanning.
Try Cleanbox free
3 aliases, spam filtering, contact management, and Shield — no credit card required.
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