# Catch-All Email Checker for Email Lists

**Use case:** 

Find which addresses sit on catch-all domains, which accept mail for any address. The smtp.catchAll field flags them. In realtime mode the Actor runs a deep check on Gmail and Microsoft catch-all domains and retries a risky result once. Every row gets a safe, risky, invalid or unknown verdict and a 0-100 quality score. No API key needed. $4.00 per 1,000 results, and every row counts as a result.

## Input

```json
{
  "emails": [
    "support@stripe.com"
  ],
  "mode": "auto",
  "concurrency": 5
}
```

## Output

```json
{
  "email": {
    "label": "Email",
    "format": "string"
  },
  "reachable": {
    "label": "Reachable",
    "format": "string"
  },
  "isValid": {
    "label": "Valid",
    "format": "boolean"
  },
  "score": {
    "label": "Score",
    "format": "number"
  },
  "syntax": {
    "label": "Syntax",
    "format": "boolean"
  },
  "smtp": {
    "label": "SMTP",
    "format": "object"
  },
  "isDisposable": {
    "label": "Disposable",
    "format": "boolean"
  },
  "isRole": {
    "label": "Role",
    "format": "boolean"
  },
  "isFree": {
    "label": "Free provider",
    "format": "boolean"
  },
  "hasGravatar": {
    "label": "Gravatar",
    "format": "boolean"
  },
  "suggestion": {
    "label": "Suggestion",
    "format": "string"
  },
  "domain": {
    "label": "Domain",
    "format": "string"
  },
  "source": {
    "label": "Source",
    "format": "string"
  },
  "verifiedAt": {
    "label": "Verified at",
    "format": "string"
  },
  "ok": {
    "label": "OK",
    "format": "boolean"
  },
  "error": {
    "label": "Error",
    "format": "string"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Bulk Email Verifier & Validator: Catch-All Check Actor is ready to run with the inputs already set for "Catch-All Email Checker for Email Lists". [Sign up or log in](https://console.apify.com/create-task-from-example/23fVg5Fzu2xoz5o5H) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Catch-All Email Checker for Email Lists" task

The Bulk Email Verifier & Validator: Catch-All Check Actor will start running based on the input automatically. You can also change all the input fields, like emails, verification mode, and more, to match your specific use case.

### 3. Receive the "Catch-All Email Checker for Email Lists" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as email, reachable, valid, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Catch-All Email Checker for Email Lists" task via API](https://apify.com/verifox/verifox-apify.md).

## FAQ

### What is a catch-all email?

A catch-all domain accepts mail for any address, so a plain SMTP check cannot tell whether one mailbox exists. The smtp.catchAll field flags these domains.

### How does the Actor handle catch-all domains?

In realtime mode it runs a deep check on accept-all Gmail and Microsoft domains and retries a risky catch-all once. Bulk mode returns the verdicts available when the job completes, so catch-all addresses can stay risky.

### Which mode should I use for catch-all lists?

Choose realtime in Verification mode. Auto mode uses realtime for up to 500 emails and bulk above that.

### Can a catch-all address still be marked risky?

Yes. The deep check aims for a firmer verdict, but a result can still stay risky.

### What does a check cost?

$4.00 per 1,000 results on Free and Starter plans, $3.50 on Scale and $3.00 on Business, plus $0.00005 per run. Every row counts as a result, including addresses that could not be checked.

## About this Actor

This example demonstrates how to use [Bulk Email Verifier & Validator: Catch-All Check](https://apify.com/verifox/verifox-apify.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/verifox/verifox-apify.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/verifox/verifox-apify.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).