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 |  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 |
Users who want the simplest possible email forwarding on a custom domain with SMTP sending capability. No frills, reliable forwarding.
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.
3 aliases, spam filtering, contact management, and Shield — no credit card required.
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