diff --git a/inc/cleantalk-ajax.php b/inc/cleantalk-ajax.php
index 785536fbe..48d12a792 100644
--- a/inc/cleantalk-ajax.php
+++ b/inc/cleantalk-ajax.php
@@ -724,15 +724,6 @@ function ct_ajax_hook($message_obj = null)
             throw new Exception($ct_result->comment);
         }
 
-        //ES Add subscriber
-        if ( Post::get('action') === 'es_add_subscriber' ) {
-            $result = array(
-                'error' => 'unexpected-error',
-            );
-            print json_encode($result);
-            die();
-        }
-
         //Convertplug. Strpos because action value dynamically changes and depends on mailing service
         if ( strpos(TT::toString(Post::get('action')), '_add_subscriber') !== false ) {
             $result = array(
diff --git a/inc/cleantalk-integrations-by-hook.php b/inc/cleantalk-integrations-by-hook.php
index 9aee99706..57aa4aded 100755
--- a/inc/cleantalk-integrations-by-hook.php
+++ b/inc/cleantalk-integrations-by-hook.php
@@ -510,6 +510,11 @@
         'setting' => 'forms__contact_forms_test',
         'ajax'    => true
     ),
+    'EmailSubscribers' => array(
+        'hook'    => 'es_add_subscriber',
+        'setting' => 'forms__contact_forms_test',
+        'ajax'    => true
+    ),
 );
 
 add_action('plugins_loaded', function () use ($apbct_active_integrations) {
diff --git a/inc/cleantalk-pluggable.php b/inc/cleantalk-pluggable.php
index f2fa74442..aaaf5f02c 100644
--- a/inc/cleantalk-pluggable.php
+++ b/inc/cleantalk-pluggable.php
@@ -1744,6 +1744,14 @@ class_exists('Cleantalk\Antispam\Integrations\CleantalkInternalForms')
         ) {
             return 'invoicing';
         }
+
+        // Email Subscribers by Icegram Express - skip subscribe action
+        if (
+            apbct_is_plugin_active('email-subscribers/email-subscribers.php') &&
+            Post::equal('action', 'es_add_subscriber')
+        ) {
+            return 'Email Subscribers by Icegram Express - skip subscribe action';
+        }
     } else {
         /*****************************************/
         /*  Here is non-ajax requests skipping   */
diff --git a/lib/Cleantalk/Antispam/Integrations/EmailSubscribers.php b/lib/Cleantalk/Antispam/Integrations/EmailSubscribers.php
new file mode 100644
index 000000000..1a375e1ea
--- /dev/null
+++ b/lib/Cleantalk/Antispam/Integrations/EmailSubscribers.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Cleantalk\Antispam\Integrations;
+
+class EmailSubscribers extends IntegrationBase
+{
+    public function getDataForChecking($argument)
+    {
+        $post_data = apply_filters('apbct__filter_post', $_POST);
+        $email = isset($post_data['esfpx_email']) ? $post_data['esfpx_email'] : '';
+        $nickname = isset($post_data['esfpx_name']) ? $post_data['esfpx_name'] : '';
+        $data = ct_gfa_dto($post_data, $email, $nickname)->getArray();
+
+        return $data;
+    }
+
+    public function doBlock($message)
+    {
+        die(
+            json_encode(
+                array(
+                    'apbct' => array(
+                        'blocked'     => true,
+                        'comment'     => $message,
+                        'stop_script' => apbct__stop_script_after_ajax_checking()
+                    )
+                )
+            )
+        );
+    }
+}
diff --git a/tests/Antispam/IntegrationsByHook/TestEmailSubscribers.php b/tests/Antispam/IntegrationsByHook/TestEmailSubscribers.php
new file mode 100644
index 000000000..160ede44a
--- /dev/null
+++ b/tests/Antispam/IntegrationsByHook/TestEmailSubscribers.php
@@ -0,0 +1,202 @@
+<?php
+
+namespace Cleantalk\Antispam\Integrations;
+
+use Cleantalk\ApbctWP\Variables\Post;
+use PHPUnit\Framework\TestCase;
+
+class TestEmailSubscribers extends TestCase
+{
+    private $integration;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->integration = new EmailSubscribers();
+    }
+
+    protected function tearDown(): void
+    {
+        // Clean up global state
+        $_POST = [];
+        Post::getInstance()->variables = [];
+        parent::tearDown();
+    }
+
+    /**
+     * Test getDataForChecking with valid subscription data
+     */
+    public function testGetDataForCheckingWithValidData()
+    {
+        $_POST = [
+            'esfpx_email' => 'stop_email@example.com',
+            'esfpx_name' => 'asfsgaeer1111',
+            'es' => 'subscribe',
+            'esfpx_form_id' => '2',
+            'esfpx_es_form_identifier' => 'f2-p6-n1',
+            'esfpx_es_email_page' => '6',
+            'esfpx_es_email_page_url' => 'https://osp65-wp7.local/?page_id=6',
+            'esfpx_status' => 'Unconfirmed',
+            'esfpx_es-subscribe' => 'c0b8a6d0be',
+            'esfpx_es_hp_email' => '',
+            'esfpx_lists' => ['59ac7ed122f5'],
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('stop_email@example.com', $result['email']);
+        $this->assertEquals('asfsgaeer1111', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with email only (no name)
+     */
+    public function testGetDataForCheckingWithEmailOnly()
+    {
+        $_POST = [
+            'esfpx_email' => 'user@example.com',
+            'es' => 'subscribe',
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('user@example.com', $result['email']);
+        $this->assertEquals('', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with name only (no email)
+     */
+    public function testGetDataForCheckingWithNameOnly()
+    {
+        $_POST = [
+            'esfpx_name' => 'TestUser',
+            'es' => 'subscribe',
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('', $result['email']);
+        $this->assertEquals('TestUser', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with empty POST data
+     */
+    public function testGetDataForCheckingWithEmptyPost()
+    {
+        $_POST = [];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('', $result['email']);
+        $this->assertEquals('', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with special characters in name
+     */
+    public function testGetDataForCheckingWithSpecialCharactersInName()
+    {
+        $_POST = [
+            'esfpx_email' => 'special@example.com',
+            'esfpx_name' => "O'Brien Müller",
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('special@example.com', $result['email']);
+        $this->assertStringContainsString("O'Brien", $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with empty strings for email and name
+     */
+    public function testGetDataForCheckingWithEmptyStrings()
+    {
+        $_POST = [
+            'esfpx_email' => '',
+            'esfpx_name' => '',
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('', $result['email']);
+        $this->assertEquals('', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking preserves full POST data for ct_gfa_dto processing
+     */
+    public function testGetDataForCheckingPreservesPostData()
+    {
+        $_POST = [
+            'esfpx_email' => 'test@example.com',
+            'esfpx_name' => 'TestName',
+            'esfpx_form_id' => '5',
+            'esfpx_es_form_identifier' => 'f5-p10-n1',
+            'esfpx_es_email_page' => '10',
+            'esfpx_es_email_page_url' => 'https://example.com/?page_id=10',
+            'esfpx_status' => 'Unconfirmed',
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('test@example.com', $result['email']);
+        $this->assertEquals('TestName', $result['nickname']);
+    }
+
+    /**
+     * Test getDataForChecking with multiple lists
+     */
+    public function testGetDataForCheckingWithMultipleLists()
+    {
+        $_POST = [
+            'esfpx_email' => 'multi@example.com',
+            'esfpx_name' => 'MultiList',
+            'esfpx_lists' => ['list1hash', 'list2hash', 'list3hash'],
+            'action' => 'es_add_subscriber',
+        ];
+
+        $result = $this->integration->getDataForChecking(null);
+
+        $this->assertIsArray($result);
+        $this->assertEquals('multi@example.com', $result['email']);
+        $this->assertEquals('MultiList', $result['nickname']);
+    }
+
+    /**
+     * Test doBlock method exists and has correct signature
+     */
+    public function testDoBlockMethodExists()
+    {
+        // Note: doBlock() uses die() which is difficult to test properly
+        // This test verifies that the method exists and can be called
+        $this->assertTrue(method_exists($this->integration, 'doBlock'));
+    }
+
+    /**
+     * Test doBlock method has correct signature
+     */
+    public function testDoBlockMethodSignature()
+    {
+        // Note: Testing die() properly requires process isolation
+        // We verify the method signature and expected behavior
+        $reflection = new \ReflectionMethod($this->integration, 'doBlock');
+        $this->assertTrue($reflection->isPublic());
+        $this->assertEquals(1, $reflection->getNumberOfParameters());
+    }
+}