diff --git a/src/DefaultServiceCollector.php b/src/DefaultServiceCollector.php
new file mode 100644
index 0000000..239e1ed
--- /dev/null
+++ b/src/DefaultServiceCollector.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace bkrukowski\TransparentEmail;
+
+use bkrukowski\TransparentEmail\Services\AppsGoogleCom;
+use bkrukowski\TransparentEmail\Services\GmailCom;
+use bkrukowski\TransparentEmail\Services\OutlookCom;
+use bkrukowski\TransparentEmail\Services\TlenPl;
+use bkrukowski\TransparentEmail\Services\Www33MailCom;
+use bkrukowski\TransparentEmail\Services\YahooCom;
+
+class DefaultServiceCollector extends ServiceCollector
+{
+    public function __construct()
+    {
+        foreach ($this->getAllServicesClasses() as $class) {
+            $this->addService(new $class());
+        }
+    }
+
+    private function getAllServicesClasses() : array
+    {
+        return [
+            GmailCom::class,
+            OutlookCom::class,
+            YahooCom::class,
+            Www33MailCom::class,
+            TlenPl::class,
+            AppsGoogleCom::class,
+        ];
+    }
+}
\ No newline at end of file
diff --git a/src/ServiceCollector.php b/src/ServiceCollector.php
new file mode 100644
index 0000000..8258942
--- /dev/null
+++ b/src/ServiceCollector.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace bkrukowski\TransparentEmail;
+
+use bkrukowski\TransparentEmail\Services\ServiceInterface;
+
+class ServiceCollector implements ServiceCollectorInterface
+{
+    private $services = [];
+
+    public function addService(ServiceInterface $service)
+    {
+        $this->services[] = $service;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getIterator()
+    {
+        foreach ($this->services as $service) {
+            yield $service;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ServiceCollectorInterface.php b/src/ServiceCollectorInterface.php
new file mode 100644
index 0000000..9d98605
--- /dev/null
+++ b/src/ServiceCollectorInterface.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace bkrukowski\TransparentEmail;
+
+use bkrukowski\TransparentEmail\Services\ServiceInterface;
+
+interface ServiceCollectorInterface extends \IteratorAggregate
+{
+    /**
+     * @return ServiceInterface[]
+     */
+    public function getIterator();
+}
\ No newline at end of file
diff --git a/src/TransparentEmail.php b/src/TransparentEmail.php
index 4c45b0c..82d2ac3 100644
--- a/src/TransparentEmail.php
+++ b/src/TransparentEmail.php
@@ -2,42 +2,23 @@
 
 namespace bkrukowski\TransparentEmail;
 
-use bkrukowski\TransparentEmail\Services\AppsGoogleCom;
-use bkrukowski\TransparentEmail\Services\GmailCom;
-use bkrukowski\TransparentEmail\Services\OutlookCom;
 use bkrukowski\TransparentEmail\Services\ServiceInterface;
-use bkrukowski\TransparentEmail\Services\TlenPl;
-use bkrukowski\TransparentEmail\Services\Www33MailCom;
-use bkrukowski\TransparentEmail\Services\YahooCom;
 
 class TransparentEmail
 {
-    const SERVICE_GMAIL_COM = GmailCom::class;
-    const SERVICE_TLEN_PL = TlenPl::class;
-    const SERVICE_WWW_33MAIL_COM = Www33MailCom::class;
-    const SERVICE_OUTLOOK_COM = OutlookCom::class;
-    const SERVICE_YAHOO_COM = YahooCom::class;
-    const SERVICE_APPS_GOOGLE_COM = AppsGoogleCom::class;
-
     /**
-     * Constant ALL_SERVICES can contain different values depends on API version
+     * @var ServiceCollectorInterface|ServiceInterface[]
      */
-    const ALL_SERVICES = [
-        self::SERVICE_GMAIL_COM,
-        self::SERVICE_TLEN_PL,
-        self::SERVICE_WWW_33MAIL_COM,
-        self::SERVICE_OUTLOOK_COM,
-        self::SERVICE_YAHOO_COM,
-        self::SERVICE_APPS_GOOGLE_COM,
-    ];
-
     private $services;
 
+    /**
+     * @var bool
+     */
     private $caseSensitiveLocalPart;
 
-    public function __construct(array $services = self::ALL_SERVICES, bool $caseSensitiveLocalPart = false)
+    public function __construct(ServiceCollectorInterface $services = null, bool $caseSensitiveLocalPart = false)
     {
-        $this->services = $services;
+        $this->services = $services ?: new DefaultServiceCollector();
         $this->caseSensitiveLocalPart = $caseSensitiveLocalPart;
     }
 
@@ -55,12 +36,9 @@ class TransparentEmail
         $domain = strtolower(explode('@', $email)[1]);
         $result = $email;
 
-        foreach ($this->services as $serviceClass) {
-            /** @var ServiceInterface $service */
-            $service = new $serviceClass();
+        foreach ($this->services as $service) {
             if ($service->isDomainSupported($domain)) {
                 $result = $service->getPrimaryEmail($result);
-                break;
             }
         }
 
diff --git a/tests/DefaultServiceCollectorTest.php b/tests/DefaultServiceCollectorTest.php
new file mode 100644
index 0000000..c5dab4c
--- /dev/null
+++ b/tests/DefaultServiceCollectorTest.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace bkrukowski\TransparentEmail\Tests;
+
+use bkrukowski\TransparentEmail\DefaultServiceCollector;
+use bkrukowski\TransparentEmail\Services\ServiceInterface;
+
+class DefaultServiceCollectorTest extends \PHPUnit_Framework_TestCase
+{
+    public function testIterator()
+    {
+        $atLeastOne = false;
+        foreach (new DefaultServiceCollector() as $service) {
+            $atLeastOne = true;
+            $this->assertInstanceOf(ServiceInterface::class, $service);
+        }
+        $this->assertTrue($atLeastOne);
+    }
+}
\ No newline at end of file
diff --git a/tests/ServiceCollectorTest.php b/tests/ServiceCollectorTest.php
new file mode 100644
index 0000000..38f77f5
--- /dev/null
+++ b/tests/ServiceCollectorTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace bkrukowski\TransparentEmail\Tests;
+
+use bkrukowski\TransparentEmail\ServiceCollector;
+use bkrukowski\TransparentEmail\Services\ServiceInterface;
+
+class ServiceCollectorTest extends \PHPUnit_Framework_TestCase
+{
+    public function testAddService()
+    {
+        $service = $this->createMock(ServiceInterface::class);
+        $collector = new ServiceCollector();
+        $collector->addService($service);
+
+        $contains = false;
+        foreach ($collector->getIterator() as $currentService) {
+            if ($currentService === $service) {
+                $contains = true;
+                break;
+            }
+        }
+
+        $this->assertTrue($contains);
+    }
+}
\ No newline at end of file
diff --git a/tests/TransparentEmailTest.php b/tests/TransparentEmailTest.php
index 95dbd4e..efa42f1 100644
--- a/tests/TransparentEmailTest.php
+++ b/tests/TransparentEmailTest.php
@@ -2,6 +2,9 @@
 
 namespace bkrukowski\TransparentEmail\Tests;
 
+use bkrukowski\TransparentEmail\ServiceCollector;
+use bkrukowski\TransparentEmail\ServiceCollectorInterface;
+use bkrukowski\TransparentEmail\Services\TlenPl;
 use bkrukowski\TransparentEmail\TransparentEmail;
 use bkrukowski\TransparentEmail\InvalidEmailException;
 
@@ -43,18 +46,31 @@ class TransparentEmailTest extends \PHPUnit_Framework_TestCase
 
     public function providerGetPrimaryEmail()
     {
+        $emptyServiceCollector = $this->createServiceCollector();
+        $tlenServiceCollector = $this->createServiceCollector([TlenPl::class]);
+
         return [
             [
-                new TransparentEmail([TransparentEmail::SERVICE_TLEN_PL]),
+                new TransparentEmail($tlenServiceCollector),
                 'john.doe+alias@gmail.com',
                 'john.doe+alias@gmail.com'
             ],
             [new TransparentEmail(), 'john.doe+alias@gmail.com', 'johndoe@gmail.com'],
-            [new TransparentEmail([]), 'John.Doe@example.com', 'john.doe@example.com'],
-            [new TransparentEmail([], true), 'John.Doe@example.com', 'John.Doe@example.com'],
-            [new TransparentEmail(TransparentEmail::ALL_SERVICES, true), 'John.Doe@gmail.com', 'johndoe@gmail.com'],
+            [new TransparentEmail($emptyServiceCollector), 'John.Doe@example.com', 'john.doe@example.com'],
+            [new TransparentEmail($emptyServiceCollector, true), 'John.Doe@example.com', 'John.Doe@example.com'],
+            [new TransparentEmail(null, true), 'John.Doe@gmail.com', 'johndoe@gmail.com'],
             [new TransparentEmail(), 'Jane.Doe+receipts@hotmail.com', 'jane.doe@hotmail.com'],
             [new TransparentEmail(), 'Jane.Doe-receipts@yahoo.com', 'jane.doe@yahoo.com'],
         ];
     }
+
+    private function createServiceCollector(array $classes = []) : ServiceCollectorInterface
+    {
+        $collector = new ServiceCollector();
+        foreach ($classes as $class) {
+            $collector->addService(new $class());
+        }
+
+        return $collector;
+    }
 }
\ No newline at end of file