AutoCatch vs ImprovMX
In the world of custom domain management, the choice often comes down to how you want to handle incoming data. Some systems treat email as a trigger for automation, while others focus on high-velocity delivery to an existing inbox.
Both Autocatch.mx and ImprovMX allow you to run multiple addresses through a single domain, but they diverge significantly in how they process, store, and route that information.
📊 Feature Matrix
| Feature | Autocatch.mx | ImprovMX |
|---|---|---|
| Primary Logic | Catch-all (Discovery) | Aliases + Wildcards |
| Routing Engine | Pattern-based / Business Concerns | Regex & CEL Rules |
| Data Retention | Logs & Attachments (Up to Unlimited) | Metadata only (7-180 days) |
| Outbound Mail | Not supported | SMTP Sending (Premium) |
| Webhooks | Native JSON POST (Payload included) | HTTP Webhooks (Premium) |
| Multi-Forwarding | Supported | Supported |
🛠 Mechanics Deep Dive
How Aliases are Managed
Autocatch.mx:
The system is built on a “set it and forget it” catch-all architecture. There is no manual mapping of individual aliases. When an email hits any-name@yourdomain.com, the system instantly recognizes the address, logs it, and executes routing rules. It is designed for workflows where aliases are generated on-the-fly (e.g., for different vendors or disposable signups) without ever touching a dashboard.
ImprovMX:
Provides a hybrid approach. Users can define specific aliases (e.g., support@) or enable a wildcard/catch-all for the entire domain. For technical power users, ImprovMX supports Regex (Regular Expression) and CEL (Common Expression Language) rules. This allows for complex matching logic—for example, routing any email containing “invoice” in the subject to a specific accounting endpoint.
How Data is Handled
Autocatch.mx: Acts as a data ingestion layer. Because it is built to support AI agents and custom APIs, it can retain the full email body and attachments for a specified period (7 days to Unlimited). This makes it possible to retrieve the actual file content via API long after the initial forward has occurred.
ImprovMX: Operates as a privacy-centric passthrough. Per their 2026 transparency protocol, they do not log email content or bodies. They retain delivery metadata (Sender, Recipient, Subject, Timestamp) for debugging purposes, typically for 7 to 180 days depending on the tier. Once an email is successfully delivered or hard-bounced, the content is purged from their local processing servers.
🔌 Integration & Extensibility
Autocatch.mx (Programmable Email) The core value prop here is the native JSON POST webhook. When an email arrives, Autocatch flattens the SMTP data into a structured JSON payload and hits your endpoint. This is specifically tuned for developers piping data into tools like OpenClaw or custom LLM pipelines, where the attachment and body content are required as machine-readable data.
ImprovMX (Full Suite Forwarding) ImprovMX leans into the traditional email workflow. In addition to webhooks, they provide SMTP credentials for paid tiers. This allows users to not only receive mail but also “Send Mail As” their custom domain aliases through clients like Gmail or Outlook. Their infrastructure is optimized for sub-5-second forwarding speeds, prioritizing low-latency delivery to your primary inbox.
🏁 The Final Vibe
Autocatch.mx is built for the “email as an API” era. It’s a tool for those who view their domain as a data source and want to automate what happens when a message arrives without managing a list of aliases.
ImprovMX is a high-performance routing engine. It’s a tool for those who need a robust, reliable bridge between their custom domains and their primary inbox, complete with the ability to send outbound mail and manage complex routing via Regex.