Real Time Email Validation:

Boost delivery rates and minimize sales funnel leaks.

Stop bouncing, start connecting!

Improve deliverability, reduce bounce rates, prevent fraud and minimize funnel leaks: End-to-End Deliverability Check, Disposable Email Detection, Catch-All Testing.

Real-Time Email Validation API

Check the quality of email addresses right at the point of entry with Byteplant's easy-to-use email verification API. Our email verification API automatically detects if an email address is valid or not and helps you to eliminate any disposable, fake and mistyped email addresses.

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How Does the Email Validation API Work?

Byteplant's Email Address Validator identifies all kinds of problematic email addresses and flags them before they harm your email sender reputation. Email Validator uses a multi-layer checking process that runs multiple checks to find out if an email address is really valid and accepts mail.

  • Complete End-to-end Email Verification
  • DNS validation, including MX record lookup
  • Disposable email address detection
  • Misspelled domain detection to prevent Typosquatting
  • SMTP connection and availability checking
  • Temporary unavailability detection
  • Mailbox existence checking
  • Catch-All testing
  • Greylisting detection

During the entire process, we never send any email to the recipient address.

Our Real-Time Online Email Verification API can be easily integrated into your sign-up forms, applications and websites or into content management systems (CMS) like WordPress, Drupal, Typo3 or Joomla. We provide detailed code examples in Javascript, PHP, Java, C#, VB.NET - all you have to do is to send a simple HTTP request to our API servers! Each request returns a result code and a detailed description.

To make things as easy as possible for you, we offer ready-made plugins for WordPress, Drupal, jQuery and Node.js for easy out-of-the-box integration.

Email-Validator - Available 24/7/365

We guarantee an availability of 99.9%. API requests will typically be answered within 750ms - please see the API server status page for real-time availability information.

Email-Validator API Demo

Please enter the email address you want to validate:
Enter an email address in the form
to see the validation results here.
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Email-Validator APIs Documentation

API Description

Real-Time Email Verification API

The Email Validation API returns the deliverability status and detailed information for the email that is provided as input.
MethodGET or POST
Example API request (GET)

Bulk Email Validation API

The Bulk API allows you to upload up to 100K email addresses for validation with a single API request.

Example API request

When the validation task is finished, we send you an email and (if requested) a HTTP GET request to the NotifyURL (with a 'taskid' parameter in the URL).

<script type="text/javascript" src="path/to/jquery"></script>
<script type="text/javascript">
$(document).ready(function() {
    // send API request
        url: '',
        type: 'POST',
        cache: false,
        crossDomain: true,
        data: { EmailAddress: 'email address', APIKey: 'your API key' },
        dataType: 'json',
        success: function (json) {
            // check API result
            if (typeof(json.status) != "undefined") {
                var resultcode = json.status;
                if (typeof( != "undefined") {
                    // short summary
                    info =;
                } else info = "";
                if (typeof(json.details) != "undefined") {
                    // detailed description
                    details = json.details;
                } else details = "";
                // resultcode 200, 207, 215 - valid
                // resultcode 215 - can be retried to update catch-all status
                // resultcode 114 - greylisting, wait 5min and retry
                // resultcode 118 - api rate limit, wait 5min and retry
                // resultcode 3xx/4xx - bad
// build API request
$APIUrl = '';
$Params = array('EmailAddress' => 'email address', 'APIKey' => 'your API key');
$Request = http_build_query($Params, '', '&');
$ctxData = array(
    'header'=>"Connection: close\r\n".
    "Content-Type: application/x-www-form-urlencoded\r\n".
    "Content-Length: ".strlen($Request)."\r\n",
$ctx = stream_context_create(array('http' => $ctxData));

// send API request
$result = json_decode(file_get_contents($APIUrl, false, $ctx));

// check API result
if ($result && $result->{'status'} > 0) {
    switch ($result->{'status'}) {
        // valid addresses have a {200, 207, 215} result code
        // result codes 114 and 118 need a retry
        case 200:
        case 207:
        case 215:
            echo "Address is valid.";
            // 215 - can be retried to update catch-all status
        case 114:
            // greylisting, wait 5min and retry
        case 118:
            // api rate limit, wait 5min and retry
            echo "Address is invalid.";
            echo $result->{'info'};
            echo $result->{'details'};
} else {
    echo $result->{'info'};
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

HttpClient client = new DefaultHttpClient();
String Email = "email address";
String APIKey = "your API key";
String APIURL = "";

try {
    HttpPost request = new HttpPost(APIURL);
    List <NameValuePair> Input = new ArrayList<NameValuePair>();
    Input.add(new BasicNameValuePair("EmailAddress", Email));
    Input.add(new BasicNameValuePair("APIKey", APIKey));
    request.setEntity(new UrlEncodedFormEntity(Input));
    HttpResponse response = client.execute(request);
    HttpEntity entity = response.getEntity();
    String Output = EntityUtils.toString(entity, "UTF-8");
    JSONParser parser = new JSONParser();
    Object obj = parser.parse(Output);
    JSONObject jsonObject = (JSONObject) obj;
    Long result = (Long) jsonObject.get("status");
    // result 200, 207, 215 - valid
    // result 215 - can be retried to update catch-all status
    // result 114 - greylisting, wait 5min and retry
    // result 118 - api rate limit, wait 5min and retry
    // result 3xx/4xx - bad
    String info = (String) jsonObject.get("info");
    String details = (String) jsonObject.get("details");
} catch (IOException e) {
} catch (ParseException e) {
} finally {
C# .NET 4.5
using System;
using System.Collections.Generic;
using System.Net.Http;

private class APIResult
    public int status { get; set; }
    public String info { get; set; }
    public String details { get; set; }

const String APIURL = "";
HttpClient client = new HttpClient();
String Email = "email address";
String APIKey = "your API key";

var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("EmailAddress", Email));
postData.Add(new KeyValuePair<string, string>("APIKey", APIKey));

HttpContent content = new FormUrlEncodedContent(postData);

HttpResponseMessage result = client.PostAsync(APIURL, content).Result;
string resultContent = result.Content.ReadAsStringAsync().Result;

APIResult res = new System.Web.Script.Serialization.JavaScriptSerializer().

switch (res.status) {
    // valid addresses have a {200, 207, 215} result code
    // result codes 114 and 118 need a retry
    case 200:
    case 207:
    case 215:
        // address is valid
        // 215 - can be retried to update catch-all status
    case 114:
        // greylisting, wait 5min and retry
    case 118:
        // api rate limit, wait 5min and retry
        // address is invalid
        // res.details
VB.NET 4.5
Private Sub checkEmail(ByVal Email As String, ByVal APIKey As String)
    Const APIURL As String = ""
    Using client As New Net.WebClient
        Dim postData As New Specialized.NameValueCollection
        postData.Add("EmailAddress", Email)
        postData.Add("APIKey", APIKey)
        Dim reply = client.UploadValues(APIURL, "POST", postData)
        Dim data As String = (New System.Text.UTF8Encoding).GetString(reply)
        Dim res = New System.Web.Script.Serialization.JavaScriptSerializer().
        Deserialize(Of APIResult)(data)
        Select Case (res.status)
            Case 200, 207, 215
            ' address is valid
            ' 215 - can be retried to update catch-all status
            Case 114, 118
            ' greylisting, wait 5min and retry
            Case 118
            ' api rate limit, wait 5min and retry
            Case Else
            ' address is invalid
        End Select
    End Using
End Sub

Private Class APIResult
    Public status As Integer
    Public info As String
    Public details As String
End Class