ImprovMX provides email forwarding and management tools for individuals, businesses, and organizations using custom domains. Its service lets customers send and receive email through domain-based addresses, with a free tier and paid plans for additional needs. Users can create aliases, configure catch-all and regex-based addresses, and direct messages through customizable routing rules. A single alias can forward to multiple destinations, discard messages, or send them to a webhook.

Beyond forwarding, ImprovMX offers SMTP email sending and a JSON Send API, along with an API for managing domains, aliases, and email logs. Its tools include a command-line interface, routing features, and delivery troubleshooting. The company reports that messages typically forward in under five seconds and states a 99.99% service-level agreement over the past 90 days. ImprovMX says it serves millions of emails daily and is trusted by more than 200,000 users. It emphasizes privacy, stating that it does not read emails or sell user data, and offers controls over what information is logged.