Validate Emails

Validate Email Addresses

curl --request POST \
  --url https://base.sanitizeemail.com/v1/api/email-validation/ \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "emails": [
    "test@example.com",
    "user@domain.com"
  ],
  "file_id": 740,
  "options": {
    "validate_smtp": false,
    "validate_syntax": true,
    "check_dmarc": false,
    "validate_mx": false
  },
  "file_tag": "validate"
}
'

import requests

url = "https://base.sanitizeemail.com/v1/api/email-validation/"

payload = {
    "emails": ["test@example.com", "user@domain.com"],
    "file_id": 740,
    "options": {
        "validate_smtp": False,
        "validate_syntax": True,
        "check_dmarc": False,
        "validate_mx": False
    },
    "file_tag": "validate"
}
headers = {
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    emails: ['test@example.com', 'user@domain.com'],
    file_id: 740,
    options: {
      validate_smtp: false,
      validate_syntax: true,
      check_dmarc: false,
      validate_mx: false
    },
    file_tag: 'validate'
  })
};

fetch('https://base.sanitizeemail.com/v1/api/email-validation/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://base.sanitizeemail.com/v1/api/email-validation/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'emails' => [
        'test@example.com',
        'user@domain.com'
    ],
    'file_id' => 740,
    'options' => [
        'validate_smtp' => false,
        'validate_syntax' => true,
        'check_dmarc' => false,
        'validate_mx' => false
    ],
    'file_tag' => 'validate'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-KEY: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://base.sanitizeemail.com/v1/api/email-validation/"

	payload := strings.NewReader("{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-KEY", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://base.sanitizeemail.com/v1/api/email-validation/")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://base.sanitizeemail.com/v1/api/email-validation/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}"

response = http.request(request)
puts response.read_body

{
  "results": [
    {
      "email": "<string>",
      "reason": {
        "format": {
          "reason": "<string>"
        },
        "dns": {
          "reason": "<string>"
        },
        "mx": {
          "reason": "<string>"
        },
        "smtp": {
          "reason": "<string>"
        },
        "dmarc": {
          "reason": "<string>"
        }
      },
      "normalized_email": "<string>",
      "is_disposable": true,
      "is_role_account": true,
      "mx_records": [
        "<string>"
      ]
    }
  ],
  "stats": {
    "total": 123,
    "valid": 123,
    "invalid": 123,
    "disposable": 123,
    "role_accounts": 123
  },
  "file_id": "<string>",
  "credits_used": 123,
  "remaining_processing": 123,
  "batch_size": 123
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": "Invalid or inactive API key"
}

{
  "error": 123,
  "message": "<string>"
}

POST

api

email-validation

Validate Email Addresses

curl --request POST \
  --url https://base.sanitizeemail.com/v1/api/email-validation/ \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "emails": [
    "test@example.com",
    "user@domain.com"
  ],
  "file_id": 740,
  "options": {
    "validate_smtp": false,
    "validate_syntax": true,
    "check_dmarc": false,
    "validate_mx": false
  },
  "file_tag": "validate"
}
'

import requests

url = "https://base.sanitizeemail.com/v1/api/email-validation/"

payload = {
    "emails": ["test@example.com", "user@domain.com"],
    "file_id": 740,
    "options": {
        "validate_smtp": False,
        "validate_syntax": True,
        "check_dmarc": False,
        "validate_mx": False
    },
    "file_tag": "validate"
}
headers = {
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    emails: ['test@example.com', 'user@domain.com'],
    file_id: 740,
    options: {
      validate_smtp: false,
      validate_syntax: true,
      check_dmarc: false,
      validate_mx: false
    },
    file_tag: 'validate'
  })
};

fetch('https://base.sanitizeemail.com/v1/api/email-validation/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://base.sanitizeemail.com/v1/api/email-validation/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'emails' => [
        'test@example.com',
        'user@domain.com'
    ],
    'file_id' => 740,
    'options' => [
        'validate_smtp' => false,
        'validate_syntax' => true,
        'check_dmarc' => false,
        'validate_mx' => false
    ],
    'file_tag' => 'validate'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-KEY: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://base.sanitizeemail.com/v1/api/email-validation/"

	payload := strings.NewReader("{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-KEY", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://base.sanitizeemail.com/v1/api/email-validation/")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://base.sanitizeemail.com/v1/api/email-validation/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"emails\": [\n    \"test@example.com\",\n    \"user@domain.com\"\n  ],\n  \"file_id\": 740,\n  \"options\": {\n    \"validate_smtp\": false,\n    \"validate_syntax\": true,\n    \"check_dmarc\": false,\n    \"validate_mx\": false\n  },\n  \"file_tag\": \"validate\"\n}"

response = http.request(request)
puts response.read_body

{
  "results": [
    {
      "email": "<string>",
      "reason": {
        "format": {
          "reason": "<string>"
        },
        "dns": {
          "reason": "<string>"
        },
        "mx": {
          "reason": "<string>"
        },
        "smtp": {
          "reason": "<string>"
        },
        "dmarc": {
          "reason": "<string>"
        }
      },
      "normalized_email": "<string>",
      "is_disposable": true,
      "is_role_account": true,
      "mx_records": [
        "<string>"
      ]
    }
  ],
  "stats": {
    "total": 123,
    "valid": 123,
    "invalid": 123,
    "disposable": 123,
    "role_accounts": 123
  },
  "file_id": "<string>",
  "credits_used": 123,
  "remaining_processing": 123,
  "batch_size": 123
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": "Invalid or inactive API key"
}

{
  "error": 123,
  "message": "<string>"
}

This endpoint validates email addresses using two different methods: direct email validation or file-based validation. You can either provide individual email addresses or reference a previously uploaded file.

Validation Methods

Direct Email Validation
File-Based Validation

Validate individual email addresses by providing them directly in the request.

{
  "emails": ["test@example.com", "user@domain.com"],
  "options": {
    "validate_smtp": true,
    "validate_syntax": true,
    "check_dmarc": true,
    "validate_mx": true
  }
}

Validate emails from a previously uploaded file using the file ID.

{
  "file_id": 740,
  "file_tag": "validate",
  "options": {
    "validate_smtp": true,
    "validate_syntax": true,
    "check_dmarc": true,
    "validate_mx": true
  }
}

How it Works

Choose Validation Method

Decide whether to validate individual emails directly or use a file-based approach

For File-Based: Upload File First (Optional)

If using file-based validation, first upload your CSV or XLSX file using the File Upload endpoint to obtain the file_id

Configure Validation Options

Set your desired validation options (syntax, DMARC, SMTP, MX records)

Submit Validation Request

Send either emails array OR file_id (not both)

Receive Results

Get validation results for the submitted emails

Request Parameters

Either/Or Requirement: You must provide either emails OR file_id, but not both in the same request.

Direct Email Validation

emails: Array of email addresses to validate
options: Validation options object

File-Based Validation

file_id: ID from a previously uploaded file
file_tag: Tag for categorizing the validation type
options: Validation options object

Validation Options

Configure which validation checks to perform:

validate_syntax: Checks email format and structure (default: true)
validate_smtp: Performs SMTP server validation (default: false)
check_dmarc: Validates DMARC policy records (default: false)
validate_mx: Checks MX record existence (default: false)

Example Workflows

Direct Email Validation

POST /v1/api/email-validation/
{
  "emails": ["john@example.com", "sarah@company.com"],
  "options": {
    "validate_syntax": true,
    "validate_smtp": true,
    "check_dmarc": false,
    "validate_mx": true
  }
}

File-Based Validation

// 1. First upload a file (if not already done)
POST /v1/api/filesupload/
// Response includes: { "id": 740, "file": "https://s3.../file.csv" }

// 2. Then validate the uploaded file
POST /v1/api/email-validation/
{
  "file_id": 740,
  "file_tag": "validate",
  "options": {
    "validate_smtp": true,
    "validate_syntax": true,
    "check_dmarc": true,
    "validate_mx": true
  }
}

Credits Consumption: Validation consumes credits based on the number of emails and validation options selected. More comprehensive validation uses more credits.

Bulk Processing: For validating large lists of emails, use the file-based approach with the File Upload endpoint for better performance and easier management.

Authorizations

X-API-KEY

string

header

required

API key for authentication

Body

application/json

Email validation request payload

emails

string<email>[]

Array of email addresses to validate (required for direct validation)

Example:

["test@example.com", "user@domain.com"]

file_id

integer

ID of the uploaded file (obtained from file upload response) - required for file-based validation

Example:

740

options

object

Validation options

Show child attributes

file_tag

enum<string>

Tag for categorizing the file processing type (required when using file_id)

Available options:

clean,

validate,

analyze

Example:

"validate"

Response

Email validation results

results

object[]

Show child attributes

stats

object

Show child attributes

file_id

string | null

File ID for batch processing

credits_used

integer

Number of credits consumed

remaining_processing

integer

Remaining emails to process

batch_size

integer

Size of the current batch

API Documentation

File endpoints

Validation endpoints

Get Results

Download Results

Validation Methods

How it Works

Request Parameters

Direct Email Validation

File-Based Validation

Validation Options

Example Workflows

Direct Email Validation

File-Based Validation

Authorizations

Body

Response

​Validation Methods

​How it Works

​Request Parameters

​Direct Email Validation

​File-Based Validation

​Validation Options

​Example Workflows

​Direct Email Validation

​File-Based Validation

Authorizations

Body

Response

Validation Methods

How it Works

Request Parameters

Direct Email Validation

File-Based Validation

Validation Options

Example Workflows

Direct Email Validation

File-Based Validation