Effortless Email Forwarding for Custom Domains
Easily send and receive emails on your domain. Fast setup, privacy-first, supports regexes, wildcards, webhooks, and an API.
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ImprovMX is an effortless email forwarding service that lets you send and receive emails using custom domains without needing to host email servers.
🚀 Overview
ImprovMX provides a simple, reliable way to forward emails from custom domain aliases to your personal inbox, solving the hassle of setting up and maintaining full email infrastructure. It offers fast delivery (under 5 seconds on average), advanced routing options like regex aliases and catch-alls, and SMTP for sending professional emails from your domain.
The service is built for indie makers, developers, small businesses, and side projects who want quick, privacy-focused email solutions for multiple domains. Founded in 2013 as a bootstrapped side project by Antoine Minoux and Cyril Nicodème, it was acquired in 2025 and now serves over 250,000 users, forwarding 30M+ emails monthly under CEO Matthew Tse.
ImprovMX was created to make custom domain email accessible, reliable, and spam-free, prioritizing user privacy (GDPR compliant, no data selling) and high uptime (99.99% SLA) with a forever-free tier.
✨ Key Features
- Effortless email forwarding with catch-all, regex aliases, and customizable routing rules (what it does: route to multiple destinations, webhooks, or blackhole; why: flexible for complex needs)
- SMTP email sending from custom domains (ensures consistent branding without 'via' tags or provider risks)
- Email logs for troubleshooting and API for programmatic management (paid plans)
- Fast & reliable: <5s delivery, handles millions daily, auto-resends for deliverability
Optional: Priority support, data migration, white-label MX on paid plans
🛠 Tech Stack
- Hosting: AWS auto-scaling infrastructure
- Architecture: Custom solutions merged with open-source software, optimized for email deliverability and performance
- Other: Multi-MX setup (mx1/2.improvmx.com), SMTP server
👥 Who Is This For?
This project is useful for:
- Developers who want to quickly add custom email to apps or sites without servers
- Teams looking for scalable forwarding for multiple domains and aliases
- Indie makers building side projects needing professional email on a budget
📸 Screenshots / Demo
- Live demo: https://improvmx.com
- GitHub: https://github.com/improvmx
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Freemium (Free plan: 1 domain, 25 aliases, 500 emails/day; Premium $9/mo: 30 domains, 100 aliases/domain, 5k/day; Pro $24/mo: 100 domains, 200 aliases/domain, 15k/day; Enterprise custom. Yearly 15% off, cancel anytime, full refund on request.)
Is the source code available?
No — closed source to protect privacy, focus on service improvements, and due to complex server architecture (may release in future).
Can I contribute?
Core is closed source; contribute to open-source CLI tool via PRs/issues at https://github.com/improvmx/cli. Send feedback/suggestions to support@improvmx.com.
📬 Contact & Links
- Website: https://improvmx.com
- GitHub: https://github.com/improvmx
- Twitter/X: https://x.com/ImprovMX
- Email: support@improvmx.com
Built with ❤️ and kept warm on WarmIndex.
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