---
title: Bulk Email Validation API - Validate and Verify Emails in Bulk
version: 1.0.0
description: Validate up to 10 email addresses in a single POST request. Each email is processed independently. Returns an array of validation results with deliverability assessment per email (valid/accept_all/invalid/unknown/risky/app_server_blocked), plus per-item error objects for failed validations. Maximum 10 email addresses per request.
openapi: 3.1.1
servers:
  - https://api.apifreaks.com/v1.0
paths: 1
operations: 1
schemas: 11
---

## Table of Contents

- [Bulk Email Validation API - Validate and Verify Emails in Bulk v1.0.0](#bulk-email-validation-api-validate-and-verify-emails-in-bulk-v100)
  - [Authentication](#authentication)
  - [Email Validation APIs](#email-validation-apis)
    - [bulkCheckEmail](#bulkcheckemail)
      - [Parameters](#parameters)
      - [Responses](#responses)
  - [Schemas](#schemas)
    - [BulkEmailValidationResponse](#bulkemailvalidationresponse)
    - [SingleEmailValidationResponse](#singleemailvalidationresponse)
    - [DomainObject](#domainobject)
    - [AccountObject](#accountobject)
    - [DnsObject](#dnsobject)
    - [AddressObject](#addressobject)
    - [EmailLocation](#emaillocation)
    - [EmailSecurity](#emailsecurity)
    - [BulkEmailRequest](#bulkemailrequest)
    - [BulkEmailRequestItem](#bulkemailrequestitem)
    - [ErrorResponse](#errorresponse)



# Bulk Email Validation API - Validate and Verify Emails in Bulk v1.0.0

Validate up to 10 email addresses in a single POST request. Each email is processed independently. Returns an array of validation results with deliverability assessment per email (valid/accept_all/invalid/unknown/risky/app_server_blocked), plus per-item error objects for failed validations. Maximum 10 email addresses per request.

Base URLs:

* [https://api.apifreaks.com/v1.0](https://api.apifreaks.com/v1.0)

## Authentication

* API Key (ApiKeyAuthHeader)
    - Parameter Name: **X-apiKey**, in: header. Pass your API key via the X-apiKey request header.

* API Key (ApiKeyAuthQuery)
    - Parameter Name: **apiKey**, in: query. Pass your API key via the apiKey query parameter.

## Email Validation APIs

### bulkCheckEmail

`POST /email-validation/bulk`

*Validate multiple email addresses*

Validates a bulk of email addresses and returns result for each. Maximum `10` email addresses per request.

> Body parameter

```json
{
  "emailData": [
    {
      "email": "user@example.com",
      "name": "string",
      "ip": "string"
    }
  ]
}
```

#### Parameters

|Name|In|Type|Required|Description|
|---|---|---|---|---|
|format|query|string|false|Format of the response|
|body|body|[BulkEmailRequest](#bulkemailrequest)|true|none|

##### Enumerated Values

|Parameter|Value|
|---|---|
|format|json|
|format|xml|

> Example responses

> Successful response. Each item corresponds to one requested email, in the same order as the request; invalid emails are reflected via validEmail/validSyntax on that item, not as a separate error object — every item has success=true regardless of validation outcome.

```json
{
  "emailResponse": [
    {
      "success": true,
      "email": "abc.def@gmail.com",
      "validEmail": "valid",
      "validSyntax": true,
      "domain": {
        "name": "gmail.com",
        "disposable": false,
        "spam": false,
        "free": true,
        "validDomain": true,
        "catchAll": false
      },
      "account": {
        "role": false,
        "fullMailBox": false
      },
      "dns": {
        "mxRecord": [
          "gmail-smtp-in.l.google.com.",
          "alt1.gmail-smtp-in.l.google.com.",
          "alt2.gmail-smtp-in.l.google.com.",
          "alt3.gmail-smtp-in.l.google.com.",
          "alt4.gmail-smtp-in.l.google.com."
        ]
      }
    },
    {
      "success": true,
      "email": "not-an-email",
      "validEmail": "INVALID_EMAIL",
      "validSyntax": false,
      "domain": {
        "name": "not-an-email",
        "validDomain": false
      }
    },
    {
      "success": true,
      "email": "random12345@yahoo.com",
      "validEmail": "accept_all",
      "validSyntax": true,
      "reason": "domain accepts all addresses.",
      "domain": {
        "name": "yahoo.com",
        "disposable": false,
        "spam": false,
        "free": true,
        "validDomain": true,
        "catchAll": true
      },
      "account": {
        "role": false,
        "fullMailBox": false
      },
      "dns": {
        "mxRecord": [
          "mta5.am0.yahoodns.net.",
          "mta6.am0.yahoodns.net.",
          "mta7.am0.yahoodns.net."
        ]
      }
    },
    {
      "success": true,
      "email": "test@example.com",
      "validEmail": "invalid",
      "validSyntax": true,
      "reason": "domain does not accept mail.",
      "domain": {
        "name": "example.com",
        "disposable": true,
        "spam": false,
        "free": false,
        "validDomain": true,
        "catchAll": false
      },
      "account": {
        "role": false
      },
      "dns": {
        "mxRecord": [
          "."
        ]
      }
    },
    {
      "success": true,
      "email": "test@neverssl.com",
      "validEmail": "unknown",
      "validSyntax": true,
      "reason": "We are unable to determine if email is valid or invalid.",
      "domain": {
        "name": "neverssl.com",
        "disposable": false,
        "spam": false,
        "free": false,
        "validDomain": true,
        "catchAll": false
      },
      "account": {
        "role": false
      },
      "dns": {
        "aRecord": [
          "34.223.124.45"
        ]
      }
    }
  ]
}
```

> Bad Request – Invalid request body

```json
{
  "timestamp": "2026-07-27T12:53:14.628Z",
  "path": "/v1.0/email-validation/bulk",
  "status": 400,
  "error": "Invalid request body Exception",
  "message": "Please provide data in required format in request body"
}
```

> Not Found – The requested resource could not be found

```json
{
  "timestamp": "2026-09-02T11:57:55.592Z",
  "path": "/v1.0/email-validation/bulkx",
  "status": 404,
  "error": "Resource Not Found",
  "message": "The requested resource could not be found. Please verify the URL and try again."
}
```

> Request Timeout

```json
{
  "timestamp": "2026-06-06T13:00:00.000Z",
  "path": "/v1.0/email-validation/bulk",
  "status": 408,
  "error": "Request Timeout",
  "message": "Timed out while connecting to the remote URL."
}
```

> Payload Too Large – emailData exceeds the maximum of 10 entries per request

```json
{
  "timestamp": "2026-09-02T11:57:34.223Z",
  "path": "/v2/email-validation/bulk",
  "status": 413,
  "error": "Payload too large Exception",
  "message": "Maximum request body size limit exceeded"
}
```

> Rate Limit Exceeded

```json
{
  "timestamp": "2026-06-06T13:00:00.000Z",
  "path": "/v1.0/email-validation/bulk",
  "status": 429,
  "error": "Too Many Requests",
  "message": "API rate limit exceeded."
}
```

#### Responses

|Status|Meaning|Description|Schema|
|---|---|---|---|
|200|[OK](https://tools.ietf.org/html/rfc7231#section-6.3.1)|Successful response. Each item corresponds to one requested email, in the same order as the request; invalid emails are reflected via validEmail/validSyntax on that item, not as a separate error object — every item has success=true regardless of validation outcome.|[BulkEmailValidationResponse](#bulkemailvalidationresponse)|
|400|[Bad Request](https://tools.ietf.org/html/rfc7231#section-6.5.1)|Bad Request – Invalid request body|[ErrorResponse](#errorresponse)|
|404|[Not Found](https://tools.ietf.org/html/rfc7231#section-6.5.4)|Not Found – The requested resource could not be found|[ErrorResponse](#errorresponse)|
|408|[Request Timeout](https://tools.ietf.org/html/rfc7231#section-6.5.7)|Request Timeout|[ErrorResponse](#errorresponse)|
|413|[Payload Too Large](https://tools.ietf.org/html/rfc7231#section-6.5.11)|Payload Too Large – emailData exceeds the maximum of 10 entries per request|[ErrorResponse](#errorresponse)|
|429|[Too Many Requests](https://tools.ietf.org/html/rfc6585#section-4)|Rate Limit Exceeded|[ErrorResponse](#errorresponse)|

#### Response Headers

|Status|Header|Type|Format|Description|
|---|---|---|---|---|
|200|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|
|200|X-Concurrent-Threads|integer||Specifies the maximum number of concurrent requests allowed.|
|200|X-Concurrent-Threads-Active|integer||Indicates the number of active concurrent requests being processed.|
|400|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|
|404|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|
|408|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|
|413|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|
|429|X-AF-Credits-Cost|integer||Specifies the number of credits consumed by the current request.|

To perform this operation, you must be authenticated by means of one of the following methods:
ApiKeyAuthHeader, ApiKeyAuthQuery

## Schemas

### BulkEmailValidationResponse

Wrapper containing the per-email results array.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|emailResponse|[[SingleEmailValidationResponse](#singleemailvalidationresponse)]|true|none|Array of per-email results, one entry per requested email, in the same order as the request. Invalid emails are reflected via validEmail/validSyntax, not a separate error shape.|

### SingleEmailValidationResponse

Email validation response containing deliverability assessment and metadata.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|success|boolean|true|none|Indicates the processing status of the validation request. true: completed successfully.|
|email|string(email)|true|none|The email address submitted for validation.|
|name|string|false|none|Optional identifier or label provided in the request for record tracking.|
|reason|string|false|none|Detailed explanation returned when validEmail is not valid. Omitted entirely when validEmail is valid.|
|validEmail|string|true|none|Comprehensive deliverability assessment. valid: recipient confirmed deliverable, reason omitted. accept_all: the domain is catch-all and accepted the recipient, so this specific mailbox is unconfirmed — see domain.catchAll, reason 'domain accepts all addresses.'. invalid: rejected mailbox, syntax failure, or the domain accepts no mail at all (a null MX). unknown: no conclusive answer, most common for domains with no MX record that only get a probe against their address record. risky: mailbox exists but over quota, or the server deferred with a greylist response. app_server_blocked: our verifier IP was blocked by the receiving server. Casing is inconsistent in the live API: syntactically invalid addresses can return the raw enum name INVALID_EMAIL instead of lowercase invalid — this is a known API bug, handle it defensively as equivalent to invalid.|
|validSyntax|boolean|true|none|Validates email address format compliance with RFC 5322 standards.|
|domain|[DomainObject](#domainobject)|true|none|Domain validation details for the email address.|
|account|[AccountObject](#accountobject)|false|none|Account-level validation details.|
|dns|[DnsObject](#dnsobject)|false|none|DNS records for the email domain. Absent entirely when the domain publishes neither an MX nor an A record.|
|address|[AddressObject](#addressobject)|false|none|Geolocation and security enrichment data for the IP address.|
|ip|string(ip)|false|none|IP address provided for geolocation and security enrichment.|

##### Enumerated Values

|Property|Value|
|---|---|
|validEmail|valid|
|validEmail|accept_all|
|validEmail|invalid|
|validEmail|INVALID_EMAIL|
|validEmail|unknown|
|validEmail|risky|
|validEmail|app_server_blocked|

### DomainObject

Domain validation details for the email address.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|name|string|true|none|Extracted domain component from the email address.|
|validDomain|boolean|true|none|Domain validation status confirming DNS resolution capability.|
|disposable|boolean|false|none|Classification flag identifying domains from temporary email service providers.|
|spam|boolean|false|none|Reputation indicator flagging domains on spam databases.|
|free|boolean|false|none|Classification indicating free or consumer-grade email service providers.|
|catchAll|boolean|false|none|Detection flag for domains configured to accept mail for any recipient address. true always corresponds to a top-level validEmail of accept_all.|

### AccountObject

Account-level validation details.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|role|boolean|true|none|Detection flag identifying role-based email addresses (e.g., admin@, support@).|
|fullMailBox|boolean|false|none|Storage capacity status indicator for the recipient mailbox.|

### DnsObject

DNS records for the email domain. Absent entirely when the domain publishes neither an MX nor an A record.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|mxRecord|[string]|false|none|Every MX hostname at the domain's lowest preference (not just one). ["."]  means the domain publishes a null MX and accepts no mail at all. Absent entirely when the domain has no MX record of any kind — check aRecord in that case.|
|aRecord|[string]|false|none|Collection of A (Address) records for the domain. Present when the domain has no MX record but does resolve to a web server or other host.|

### AddressObject

Geolocation and security enrichment data for the IP address.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|validIpAddress|boolean|false|none|IP recognized/reachable by the geolocation provider.|
|location|[EmailLocation](#emaillocation)|false|none|Geolocation data derived from the IP address.|
|security|[EmailSecurity](#emailsecurity)|false|none|Threat and anonymity profile for the IP address.|

### EmailLocation

Geolocation data derived from the IP address.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|city|string|false|none|Municipal or city name.|
|district|string|false|none|District or neighborhood.|
|zipcode|string|false|none|Postal or ZIP code.|
|state_prov|string|false|none|State or province.|
|country_name|string|false|none|Common country name.|
|country_name_official|string|false|none|Official country name.|
|country_code2|string|false|none|Two-character ISO country code.|
|country_code3|string|false|none|Three-character ISO country code.|
|continent_name|string|false|none|Continental region name.|
|continent_code|string|false|none|Continental region identifier.|
|accuracy_radius|string|false|none|Geolocation precision radius.|
|confidence|string|false|none|Confidence score for geolocation accuracy.|
|is_eu|boolean|false|none|European Union membership status.|

### EmailSecurity

Threat and anonymity profile for the IP address.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|threat_score|integer|true|none|Quantitative risk assessment score. Higher values indicate elevated security risk.|
|is_tor|boolean|true|none|Detection flag for IP addresses routed through the Tor anonymity network.|
|is_proxy|boolean|true|none|Detection flag identifying IP addresses operating as proxy servers.|
|proxy_type|string|true|none|Classification of detected proxy infrastructure type (e.g. VPN, HTTP, SOCKS).|
|proxy_provider|string|true|none|Identified service provider operating the proxy infrastructure.|
|is_anonymous|boolean|true|none|Anonymization detection flag for IP addresses using identity obfuscation techniques.|
|is_known_attacker|boolean|true|none|Threat intelligence flag for IP addresses documented as confirmed malicious sources.|
|is_spam|boolean|true|none|Reputation flag for IP addresses associated with spam transmission.|
|is_bot|boolean|true|none|Automated traffic detection flag for IP addresses from bot networks.|
|is_cloud_provider|boolean|true|none|Infrastructure classification flag for IP addresses from cloud computing providers.|
|cloud_provider|string|true|none|Identified cloud infrastructure or hosting service provider name.|

### BulkEmailRequest

Request body for bulk email validation.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|emailData|[[BulkEmailRequestItem](#bulkemailrequestitem)]|true|none|Array of email objects to validate. Maximum 10 per request.|

### BulkEmailRequestItem

A single email entry in a bulk validation request.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|email|string(email)|true|none|Email address to validate.|
|name|string|false|none|Optional name or label.|
|ip|string(ip)|false|none|Optional IP address for enrichment.|

### ErrorResponse

Standard error envelope returned by the API on failed requests.

#### Properties

|Name|Type|Required|Restrictions|Description|
|---|---|---|---|---|
|error|string|false|none|Short error category or exception type.|
|message|string|true|none|Human-readable error message describing the failure.|
|path|string|false|none|API endpoint path that produced the error.|
|status|integer|false|none|HTTP status code returned with the error.|
|timestamp|string(date-time)|false|none|Timestamp when the error occurred (ISO 8601).|