diff --git a/src/Api/Mailboxes.php b/src/Api/Mailboxes.php
new file mode 100644
index 0000000..5c3cf01
--- /dev/null
+++ b/src/Api/Mailboxes.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Api;
+
+use Mailgun\Assert;
+use Mailgun\Model\Mailboxes\CreateResponse;
+use Mailgun\Model\Mailboxes\DeleteResponse;
+use Mailgun\Model\Mailboxes\ShowResponse;
+use Mailgun\Model\Mailboxes\UpdateResponse;
+
+class Mailboxes extends HttpApi
+{
+    const MIN_PASSWORD_LENGTH = 5;
+    
+    /**
+     * @param string $domain
+     * @param array  $parameters
+     *
+     * @return CreateResponse
+     *
+     * @throws \Exception
+     */
+    public function create(string $domain, array $parameters)
+    {
+        Assert::stringNotEmpty($domain);
+        Assert::isArray($parameters);
+        Assert::keyExists($parameters ,'mailbox');
+        Assert::keyExists($parameters ,'password');
+        Assert::minLength($parameters['password'], self::MIN_PASSWORD_LENGTH);
+
+        $response = $this->httpPost(sprintf('/v3/%s/mailboxes', $domain), $parameters);
+
+        return $this->hydrateResponse($response, CreateResponse::class);
+    }
+
+    /**
+     * @param string $domain
+     * @param array  $parameters
+     *
+     * @return ShowResponse
+     *
+     * @throws \Exception
+     */
+    public function show(string $domain, array $parameters = [])
+    {
+        Assert::stringNotEmpty($domain);
+        Assert::isArray($parameters);
+
+        $response = $this->httpGet(sprintf('/v3/%s/mailboxes', $domain), $parameters);
+
+        return $this->hydrateResponse($response, ShowResponse::class);
+    }
+
+    /**
+     * @param string $domain
+     * @param string $mailbox
+     * @param array  $parameters
+     *
+     * @return UpdateResponse
+     *
+     * @throws \Exception
+     */
+    public function update(string $domain, string $mailbox, array $parameters = [])
+    {
+        Assert::stringNotEmpty($domain);
+        Assert::stringNotEmpty($mailbox);
+        Assert::isArray($parameters);
+
+        $response = $this->httpPut(sprintf('/v3/%s/mailboxes/%s', $domain, $mailbox), $parameters);
+
+        return $this->hydrateResponse($response, UpdateResponse::class);
+    }
+
+    /**
+     * @param string $address
+     * @param string $mailbox
+     *
+     * @return DeleteResponse
+     *
+     * @throws \Exception
+     */
+    public function delete(string $domain, string $mailbox)
+    {
+        Assert::stringNotEmpty($domain);
+        Assert::stringNotEmpty($mailbox);
+
+        $response = $this->httpDelete(sprintf('/v3/%s/mailboxes/%s', $domain, $mailbox));
+
+        return $this->hydrateResponse($response, DeleteResponse::class);
+    }
+}
diff --git a/src/Mailgun.php b/src/Mailgun.php
index de4c58b..a0d667e 100644
--- a/src/Mailgun.php
+++ b/src/Mailgun.php
@@ -143,4 +143,9 @@ class Mailgun
     {
         return new Api\Webhook($this->httpClient, $this->requestBuilder, $this->hydrator, $this->apiKey);
     }
+
+    public function mailboxes(): Api\Mailboxes
+    {
+        return new Api\Mailboxes($this->httpClient, $this->requestBuilder, $this->hydrator, $this->apiKey);
+    }
 }
diff --git a/src/Model/Mailboxes/CreateResponse.php b/src/Model/Mailboxes/CreateResponse.php
new file mode 100644
index 0000000..c894ceb
--- /dev/null
+++ b/src/Model/Mailboxes/CreateResponse.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Mailboxes;
+
+use Mailgun\Model\ApiResponse;
+
+final class CreateResponse implements ApiResponse
+{
+    private $message;
+
+    public static function create(array $data): self
+    {
+        $model = new self();
+        $model->message = $data['message'] ?? null;
+
+        return $model;
+    }
+
+    private function __construct()
+    {
+    }
+
+    public function getMessage(): ?string
+    {
+        return $this->message;
+    }
+}
diff --git a/src/Model/Mailboxes/DeleteResponse.php b/src/Model/Mailboxes/DeleteResponse.php
new file mode 100644
index 0000000..288b54a
--- /dev/null
+++ b/src/Model/Mailboxes/DeleteResponse.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Mailboxes;
+
+use Mailgun\Model\ApiResponse;
+
+final class DeleteResponse implements ApiResponse
+{
+    private $message;
+    private $spec;
+
+    public static function create(array $data): self
+    {
+        $model = new self();
+        $model->message = $data['message'] ?? null;
+        $model->spec = $data['spec'] ?? null;
+
+        return $model;
+    }
+
+    private function __construct()
+    {
+    }
+
+    public function getMessage(): ?string
+    {
+        return $this->message;
+    }
+
+    public function getSpec(): ?string
+    {
+        return $this->spec;
+    }
+}
diff --git a/src/Model/Mailboxes/ShowResponse.php b/src/Model/Mailboxes/ShowResponse.php
new file mode 100644
index 0000000..23c286d
--- /dev/null
+++ b/src/Model/Mailboxes/ShowResponse.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Mailboxes;
+
+use Mailgun\Model\ApiResponse;
+
+final class ShowResponse implements ApiResponse
+{
+    private $totalCount;
+    private $items;
+
+    public static function create(array $data): self
+    {
+        $model = new self();
+        $model->totalCount = $data['total_count'] ?? null;
+        $model->items = $data['items'] ?? null;
+
+        return $model;
+    }
+
+    private function __construct()
+    {
+    }
+
+    public function getTotalCount(): ?string
+    {
+        return $this->totalCount;
+    }
+
+    public function getItems(): ?string
+    {
+        return $this->items;
+    }
+}
diff --git a/src/Model/Mailboxes/UpdateResponse.php b/src/Model/Mailboxes/UpdateResponse.php
new file mode 100644
index 0000000..3ce888b
--- /dev/null
+++ b/src/Model/Mailboxes/UpdateResponse.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Mailboxes;
+
+use Mailgun\Model\ApiResponse;
+
+final class UpdateResponse implements ApiResponse
+{
+    private $message;
+
+    public static function create(array $data): self
+    {
+        $model = new self();
+        $model->message = $data['message'] ?? null;
+
+        return $model;
+    }
+
+    private function __construct()
+    {
+    }
+
+    public function getMessage(): ?string
+    {
+        return $this->message;
+    }
+}
diff --git a/tests/Api/MailboxesTest.php b/tests/Api/MailboxesTest.php
new file mode 100644
index 0000000..b2f8719
--- /dev/null
+++ b/tests/Api/MailboxesTest.php
@@ -0,0 +1,101 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Tests\Api;
+
+use GuzzleHttp\Psr7\Response;
+use Mailgun\Api\Mailboxes;
+use Mailgun\Exception\InvalidArgumentException;
+
+class MailboxesTest extends TestCase
+{
+    public function testCreate()
+    {
+        $parameters = [
+            'mailbox' => 'mailbox',
+            'password' => 'password123',
+        ];
+        $domain = 'testing@domain.com';
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('httpPost')
+            ->with(sprintf('/v3/%s/mailboxes', $domain), $parameters)
+            ->willReturn(new Response());
+
+        $api->create($domain, $parameters);
+    }
+
+    public function testCreateInvalidPassword()
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $parameters = [
+            'mailbox' => 'mailbox',
+            'password' => 'pass',
+        ];
+        $domain = 'testing@domain.com';
+        $api = $this->getApiMock();
+
+        $api->create($domain, $parameters);
+    }
+
+    public function testShow()
+    {
+        $parameters = [
+            'limit' => '2',
+            'skip' => '4',
+        ];
+        $domain = 'testing@domain.com';
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('httpGet')
+            ->with(sprintf('/v3/%s/mailboxes', $domain), $parameters)
+            ->willReturn(new Response());
+
+        $api->show($domain, $parameters);
+    }
+
+    public function testUpdate()
+    {
+        $parameters = [
+            'password' => 'password123',
+        ];
+        $mailbox = 'mailboxname';
+        $domain = 'testing@domain.com';
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('httpPut')
+            ->with(sprintf('/v3/%s/mailboxes/%s', $domain, $mailbox), $parameters)
+            ->willReturn(new Response());
+
+        $api->update($domain, $mailbox, $parameters);
+    }
+
+    public function testDelete()
+    {
+        $domain = 'testing@domain.com';
+        $mailbox = 'mailboxname';
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('httpDelete')
+            ->with(sprintf('/v3/%s/mailboxes/%s', $domain, $mailbox))
+            ->willReturn(new Response());
+
+        $api->delete($domain, $mailbox);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getApiClass()
+    {
+        return Mailboxes::class;
+    }
+}