# Verify B2B signup email domains (MX, SPF, DMARC, disposable)

**Use case:** 

Bulk-check signup or lead email addresses for MX records, SPF and DMARC, free-mail and disposable domains before onboarding or CRM import. Demo uses placeholder and public test addresses.

## Input

```json
{
  "emails": [
    "info@example.com",
    "sales@example.org",
    "test@mailinator.com"
  ]
}
```

## Output

```json
{
  "input": {
    "label": "As supplied",
    "format": "string"
  },
  "domain": {
    "label": "Domain",
    "format": "string"
  },
  "syntaxValid": {
    "label": "Email syntax OK",
    "format": "boolean"
  },
  "hasMx": {
    "label": "Domain has MX records",
    "format": "boolean"
  },
  "mailProvider": {
    "label": "Detected mail provider",
    "format": "string"
  },
  "spf": {
    "label": "SPF record",
    "format": "string"
  },
  "dmarcPolicy": {
    "label": "DMARC policy",
    "format": "string"
  },
  "disposable": {
    "label": "Disposable domain",
    "format": "boolean"
  },
  "freeProvider": {
    "label": "Free webmail",
    "format": "boolean"
  },
  "deliverable": {
    "label": "likely / unlikely",
    "format": "string"
  }
}
```

## How it works

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

The Email Domain Checker Actor is ready to run with the inputs already set for "Verify B2B signup email domains (MX, SPF, DMARC, disposable)". [Sign up or log in](https://console.apify.com/create-task-from-example/PRgNlHoaLr0V8y6ef) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Verify B2B signup email domains (MX, SPF, DMARC, disposable)" task

The Email Domain Checker Actor will start running based on the input automatically. You can also change all the input fields, like emails or domains, to match your specific use case.

### 3. Receive the "Verify B2B signup email domains (MX, SPF, DMARC, disposable)" 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 as supplied, domain, email syntax ok, 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 "Verify B2B signup email domains (MX, SPF, DMARC, disposable)" task via API](https://apify.com/sterlingverify/email-domain-checker.md).

## About this Actor

This example demonstrates how to use [Email Domain Checker](https://apify.com/sterlingverify/email-domain-checker.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/sterlingverify/email-domain-checker.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/sterlingverify/email-domain-checker.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`).