Email Verification API: Validate Addresses

Sendzovo Email Verification checks an address before you send to it. Verification uses a separate account-level Verification API key and does not require a sending domain.

Separate credentials

Verification API keys cannot be used to send transactional email.

Simple verification

GET /verifyEmail

GET https://api.sendzovo.com/v1/verifyEmail?email=user@example.com

Verification request

curl -G "https://api.sendzovo.com/v1/verifyEmail" \
  -H "Authorization: Bearer YOUR_VERIFICATION_API_KEY" \
  --data-urlencode "email=user@example.com"

<?php

require 'vendor/autoload.php';

use Sendzovo\Client;

$sendzovo = Client::withVerificationKey(
    $_ENV['SENDZOVO_VERIFICATION_API_KEY']
);

$result = $sendzovo->verification()->verify(
    'user@example.com'
);

print_r($result);

const params = new URLSearchParams({
  email: "user@example.com"
});

const response = await fetch(
  "https://api.sendzovo.com/v1/verifyEmail?" + params,
  {
    headers: {
      "Authorization":
        "Bearer YOUR_VERIFICATION_API_KEY"
    }
  }
);

const data = await response.json();

console.log(data);

import requests

response = requests.get(
    "https://api.sendzovo.com/v1/verifyEmail",

    headers={
        "Authorization":
            "Bearer YOUR_VERIFICATION_API_KEY"
    },

    params={
        "email": "user@example.com"
    },
)

print(response.json())

using System.Net.Http.Headers;
using System.Web;

using var client = new HttpClient();

client.DefaultRequestHeaders.Authorization =
    new AuthenticationHeaderValue(
        "Bearer",
        "YOUR_VERIFICATION_API_KEY"
    );

var response = await client.GetAsync(
    "https://api.sendzovo.com/v1/verifyEmail?email=" +
    HttpUtility.UrlEncode("user@example.com")
);

var result =
    await response.Content.ReadAsStringAsync();

Console.WriteLine(result);

Example response

{
  "email": "user@example.com",
  "result": "valid"
}

Detailed verification

GET /verifyEmailDetailed

GET https://api.sendzovo.com/v1/verifyEmailDetailed?email=user@example.com

Detailed verification request

curl -G "https://api.sendzovo.com/v1/verifyEmailDetailed" \
  -H "Authorization: Bearer YOUR_VERIFICATION_API_KEY" \
  --data-urlencode "email=user@example.com"

<?php

require 'vendor/autoload.php';

use Sendzovo\Client;

$sendzovo = Client::withVerificationKey(
    $_ENV['SENDZOVO_VERIFICATION_API_KEY']
);

$result = $sendzovo->verification()->verifyDetailed(
    'user@example.com'
);

print_r($result);

const params = new URLSearchParams({
  email: "user@example.com"
});

const response = await fetch(
  "https://api.sendzovo.com/v1/verifyEmailDetailed?" + params,
  {
    headers: {
      "Authorization":
        "Bearer YOUR_VERIFICATION_API_KEY"
    }
  }
);

const data = await response.json();

console.log(data);

import requests

response = requests.get(
    "https://api.sendzovo.com/v1/verifyEmailDetailed",

    headers={
        "Authorization":
            "Bearer YOUR_VERIFICATION_API_KEY"
    },

    params={
        "email": "user@example.com"
    },
)

print(response.json())

using System.Net.Http.Headers;
using System.Web;

using var client = new HttpClient();

client.DefaultRequestHeaders.Authorization =
    new AuthenticationHeaderValue(
        "Bearer",
        "YOUR_VERIFICATION_API_KEY"
    );

var response = await client.GetAsync(
    "https://api.sendzovo.com/v1/verifyEmailDetailed?email=" +
    HttpUtility.UrlEncode("user@example.com")
);

var result =
    await response.Content.ReadAsStringAsync();

Console.WriteLine(result);

The detailed endpoint can return additional verification information including the following fields when available:

Field	Description
`email`	Email address checked.
`result`	Public verification result.
`internalResult`	Detailed internal classification.
`mxServer`	Detected MX server.
`mxServerIp`	Detected MX server IP address.
`esp`	Detected email service provider when available.
`account`	Mailbox/account portion of the address.
`tag`	Address tag when detected.
`isRole`	Whether the address appears to be role-based.
`isFree`	Whether the mailbox uses a free email provider.
`isNoReply`	Whether the address appears to be a no-reply address.
`smtpCode`	SMTP response code when available.
`catchAll`	Catch-all detection result.
`latencyMs`	Verification latency in milliseconds.

Each verification request consumes one verification credit from your available verification allowance.

Ready to send?

Create a free Sendzovo account, verify your domain and send your first email in minutes.

Start building