diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..61365be
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,38 @@
+name: Check
+on:
+    schedule:
+        - cron: "5 15 * * *"
+    workflow_dispatch:
+    pull_request:
+    push:
+        branches:
+            - main
+
+jobs:
+    cs:
+        if: github.event_name != 'schedule'
+        runs-on: ubuntu-24.04
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v6
+
+            - name: Run CS
+              uses: shopware/github-actions/extension-verifier@main
+              with:
+                  action: format
+
+    check:
+        runs-on: ubuntu-24.04
+        strategy:
+            fail-fast: false
+            matrix:
+                version-selection: [ 'lowest', 'highest']
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v6
+
+            - name: Run Check
+              uses: shopware/github-actions/extension-verifier@main
+              with:
+                  action: check
+                  check-against: ${{ matrix.version-selection }}
\ No newline at end of file
diff --git a/README.md b/README.md
index 41fcfd9..a20fff4 100644
--- a/README.md
+++ b/README.md
@@ -1,24 +1,24 @@
-# FroshMailValidation
+# FroshMailAddressTester
 
-This plugin for Shopware 6 validates email addresses during customer registration and checkout processes to ensure the mailbox is accessible and potentially valid.
+This plugin for Shopware 6 tests email address during customer registration and checkout processes to ensure the mailbox is accessible and potentially valid.
 
 ## Installation
 
 ### Via Composer
 
 ```bash
-composer require frosh/mail-validation
+composer require frosh/mail-address-tester
 ```
 
 ```bash
 bin/console plugin:refresh
-bin/console plugin:install --activate FroshMailValidation
+bin/console plugin:install --activate FroshMailAddressTester
 bin/console cache:clear
 ```
 
 ## Support
 
-- **GitHub Issues**: [https://github.com/FriendsOfShopware/FroshMailValidation/issues](https://github.com/FriendsOfShopware/FroshMailValidation/issues)
+- **GitHub Issues**: [https://github.com/FriendsOfShopware/FroshMailAddressTester/issues](https://github.com/FriendsOfShopware/FroshMailAddressTester/issues)
 
 ## License
 
diff --git a/composer.json b/composer.json
index 3041c7a..81bb8ca 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
-    "name": "frosh/mail-validation",
+    "name": "frosh/mail-address-tester",
     "description": "Validates email addresses by checking their actual existence on the target mail server. Reduces bounces, fake addresses, and sustainably improves deliverability.",
     "type": "shopware-platform-plugin",
     "version": "1.0.0",
@@ -10,32 +10,32 @@
     ],
     "require": {
         "shopware/core": "~6.7",
-        "shyim/check-if-email-exists": "^1.0"
+        "shyim/check-if-email-exists": "^1.0.2"
     },
     "license": "MIT",
     "autoload": {
         "psr-4": {
-            "Frosh\\MailValidation\\": "src/"
+            "Frosh\\MailAddressTester\\": "src/"
         }
     },
     "extra": {
-        "shopware-plugin-class": "Frosh\\MailValidation\\FroshMailValidation",
+        "shopware-plugin-class": "Frosh\\MailAddressTester\\FroshMailAddressTester",
         "copyright": "FriendsOfShopware",
         "label": {
-            "de-DE": "E-Mail-Validierung durch Überprüfung der Existenz",
-            "en-GB": "MailValidation by checking existence"
+            "de-DE": "E-Mail-Adressen-Tester",
+            "en-GB": "Mail address tester"
         },
         "description": {
             "de-DE": "Validiert E-Mail-Adressen durch Prüfung der tatsächlichen Existenz beim Zielserver. Reduziert Bounces, Fake-Adressen und verbessert nachhaltig die Zustellbarkeit.",
             "en-GB": "Validates email addresses by checking their actual existence on the target mail server. Reduces bounces, fake addresses, and sustainably improves deliverability."
         },
         "manufacturerLink": {
-            "de-DE": "https://github.com/FriendsOfShopware/FroshMailValidation/",
-            "en-GB": "https://github.com/FriendsOfShopware/FroshMailValidation/"
+            "de-DE": "https://github.com/FriendsOfShopware/FroshMailAddressTester/",
+            "en-GB": "https://github.com/FriendsOfShopware/FroshMailAddressTester/"
         },
         "supportLink": {
-            "de-DE": "https://github.com/FriendsOfShopware/FroshMailValidation/",
-            "en-GB": "https://github.com/FriendsOfShopware/FroshMailValidation/"
+            "de-DE": "https://github.com/FriendsOfShopware/FroshMailAddressTester/",
+            "en-GB": "https://github.com/FriendsOfShopware/FroshMailAddressTester/"
         }
     },
     "scripts": {
diff --git a/src/Constraint/TestEmail.php b/src/Constraint/TestEmail.php
index 1b0e732..013cb3d 100644
--- a/src/Constraint/TestEmail.php
+++ b/src/Constraint/TestEmail.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-namespace Frosh\MailValidation\Constraint;
+namespace Frosh\MailAddressTester\Constraint;
 
 use Symfony\Component\Validator\Attribute\HasNamedArguments;
 use Symfony\Component\Validator\Constraint;
diff --git a/src/Constraint/TestEmailValidator.php b/src/Constraint/TestEmailValidator.php
index 801635d..6063c85 100644
--- a/src/Constraint/TestEmailValidator.php
+++ b/src/Constraint/TestEmailValidator.php
@@ -1,18 +1,18 @@
 <?php declare(strict_types=1);
 
-namespace Frosh\MailValidation\Constraint;
+namespace Frosh\MailAddressTester\Constraint;
 
-use Frosh\MailValidation\Service\Validator;
+use Frosh\MailAddressTester\Service\Tester;
 use Symfony\Component\DependencyInjection\Attribute\AutoconfigureTag;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
 
-#[AutoconfigureTag('monolog.logger', ['channel' => 'frosh-mail-validation'])]
+#[AutoconfigureTag('monolog.logger', ['channel' => 'frosh_mail_tester'])]
 #[AutoconfigureTag(name: 'validator.constraint_validator')]
 class TestEmailValidator extends ConstraintValidator
 {
     public function __construct(
-        private readonly Validator $emailValidator,
+        private readonly Tester $emailAddressTester,
     ) {
     }
 
@@ -26,7 +26,7 @@ public function validate(mixed $value, Constraint $constraint): void
             return;
         }
 
-        if ($this->emailValidator->validateEmail($value)) {
+        if ($this->emailAddressTester->validateEmail($value)) {
             return;
         }
 
diff --git a/src/FroshMailAddressTester.php b/src/FroshMailAddressTester.php
new file mode 100644
index 0000000..afdb87e
--- /dev/null
+++ b/src/FroshMailAddressTester.php
@@ -0,0 +1,39 @@
+<?php declare(strict_types=1);
+
+namespace Frosh\MailAddressTester;
+
+use Shopware\Core\Framework\Plugin;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Loader\DelegatingLoader;
+use Symfony\Component\Config\Loader\LoaderResolver;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\DirectoryLoader;
+use Symfony\Component\DependencyInjection\Loader\GlobFileLoader;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+class FroshMailAddressTester extends Plugin
+{
+    public function build(ContainerBuilder $container): void
+    {
+        parent::build($container);
+
+        $locator = new FileLocator('Resources/config');
+
+        $resolver = new LoaderResolver([
+            new YamlFileLoader($container, $locator),
+            new GlobFileLoader($container, $locator),
+            new DirectoryLoader($container, $locator),
+        ]);
+
+        $configLoader = new DelegatingLoader($resolver);
+
+        $confDir = \rtrim($this->getPath(), '/') . '/Resources/config';
+
+        $configLoader->load($confDir . '/{packages}/*.yaml', 'glob');
+    }
+
+    public function executeComposerCommands(): bool
+    {
+        return true;
+    }
+}
diff --git a/src/FroshMailValidation.php b/src/FroshMailValidation.php
deleted file mode 100644
index cd58e19..0000000
--- a/src/FroshMailValidation.php
+++ /dev/null
@@ -1,13 +0,0 @@
-<?php declare(strict_types=1);
-
-namespace Frosh\MailValidation;
-
-use Shopware\Core\Framework\Plugin;
-
-class FroshMailValidation extends Plugin
-{
-    public function executeComposerCommands(): bool
-    {
-        return true;
-    }
-}
diff --git a/src/Resources/config/config.xml b/src/Resources/config/config.xml
index 79f9c3c..0cb7852 100644
--- a/src/Resources/config/config.xml
+++ b/src/Resources/config/config.xml
@@ -6,13 +6,42 @@
         <title>Basic Configuration</title>
         <title lang="de-DE">Grundeinstellungen</title>
 
+        <input-field type="single-select">
+            <name>level</name>
+            <label>Level of test</label>
+            <label lang="de-DE">Level des Tests</label>
+            <defaultValue>simple</defaultValue>
+            <helpText><![CDATA[
+                <strong>simple</strong>: just checks if the domain has an announced mail server (MX record)
+                <br/>
+                <strong>SMTP</strong>: checks if an email would be deliverable by connecting to the mail server and simulating a mail delivery without really sending. Diese Prüfung dauert länger. Make sure the email address provided in the next field is valid, otherwise, some checks will be false-negative.
+            ]]></helpText>
+            <helpText lang="de-DE"><![CDATA[
+                <strong>Einfach</strong>: Es wird lediglich geprüft, ob für die Domain ein bekanntgegebener Mailserver (MX-Eintrag) existiert.
+                <br/>
+                <strong>SMTP</strong>: Diese Option prüft die Zustellbarkeit einer E-Mail, indem sie eine Verbindung zum Mailserver herstellt und die Zustellung simuliert, ohne die E-Mail tatsächlich zu senden. Diese Prüfung dauert länger. Stellen Sie sicher, dass die im nächsten Feld angegebene E-Mail-Adresse gültig ist, da es sonst zu Fehlalarmen kommen kann.
+            ]]></helpText>
+            <options>
+                <option>
+                    <id>simple</id>
+                    <name>simple</name>
+                    <name lang="de-DE">einfach</name>
+                </option>
+                <option>
+                    <id>smtp</id>
+                    <name>smtp</name>
+                    <name lang="de-DE">SMTP</name>
+                </option>
+            </options>
+        </input-field>
+
         <input-field>
             <name>verifyEmail</name>
-            <label>email address to be used for the validator</label>
+            <label>email address to be used for the smtp test</label>
             <label lang="de-DE">E-Mail-Adresse für die Validierung </label>
             <defaultValue>verify@example.com</defaultValue>
-            <helpText>This is important to be a valid mail domain. Otherwise, some checks will be false-positive.</helpText>
-            <helpText lang="de-DE">Es ist wichtig, dass es sich um eine gültige E-Mail-Domain handelt. Andernfalls liefern einige Prüfungen falsch-positive Ergebnisse.</helpText>
+            <helpText>This is important to be a valid mail domain. Otherwise, some checks will be false-negative.</helpText>
+            <helpText lang="de-DE">Es ist wichtig, dass es sich um eine gültige E-Mail-Domain handelt. Andernfalls liefern einige Prüfungen falsch-negative Ergebnisse.</helpText>
         </input-field>
     </card>
 </config>
\ No newline at end of file
diff --git a/src/Resources/config/packages/monolog.yaml b/src/Resources/config/packages/monolog.yaml
new file mode 100644
index 0000000..71cec37
--- /dev/null
+++ b/src/Resources/config/packages/monolog.yaml
@@ -0,0 +1,10 @@
+monolog:
+    channels: ['frosh_mail_tester']
+
+    handlers:
+        FroshMailTesterHandler:
+            type: rotating_file
+            max_files: 14
+            path: '%kernel.logs_dir%/frosh_mail_tester_%kernel.environment%.log'
+            level: error
+            channels: ['frosh_mail_tester']
diff --git a/src/Resources/config/services.yaml b/src/Resources/config/services.yaml
index 52c2d08..0ea7360 100644
--- a/src/Resources/config/services.yaml
+++ b/src/Resources/config/services.yaml
@@ -2,6 +2,6 @@ services:
     _defaults:
         autowire: true
         autoconfigure: true
-    Frosh\MailValidation\:
+    Frosh\MailAddressTester\:
         resource: '../../*'
-        exclude: '../../{Resources,FroshMailValidation.php}'
+        exclude: '../../{Resources,FroshMailAddressTester.php}'
diff --git a/src/Service/Tester.php b/src/Service/Tester.php
new file mode 100644
index 0000000..80b513e
--- /dev/null
+++ b/src/Service/Tester.php
@@ -0,0 +1,111 @@
+<?php declare(strict_types=1);
+
+namespace Frosh\MailAddressTester\Service;
+
+use Psr\Cache\CacheItemInterface;
+use Psr\Cache\CacheItemPoolInterface;
+use Psr\Log\LoggerInterface;
+use Shopware\Core\Framework\Util\Hasher;
+use Shopware\Core\System\SystemConfig\SystemConfigService;
+use Shyim\CheckIfEmailExists\DNS;
+use Shyim\CheckIfEmailExists\SMTP;
+use Shyim\CheckIfEmailExists\Syntax;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+
+class Tester
+{
+    public function __construct(
+        private readonly SystemConfigService $systemConfigService,
+        #[Autowire('cache.app')]
+        private readonly CacheItemPoolInterface $cache,
+        private readonly LoggerInterface $froshMailAddressTesterLogger,
+    ) {
+    }
+
+    public function validateEmail(string $email): bool
+    {
+        $email = \strtolower($email);
+
+        $mailValidCache = $this->getCacheItem($email);
+        $mailValidCacheResult = $mailValidCache->get();
+        if (\is_bool($mailValidCacheResult)) {
+            return $mailValidCacheResult;
+        }
+
+        $syntaxResult = new Syntax($email);
+        if ($syntaxResult->isValid() === false) {
+            return false;
+        }
+
+        $domain = $syntaxResult->domain;
+
+        $domainValidCache = $this->getCacheItem($domain);
+        // first check if the domain is already marked as invalid
+        if ($domainValidCache->get() === false) {
+            return false;
+        }
+
+        $mxRecords = (new DNS())->getMxRecords($domain);
+
+        if (empty($mxRecords)) {
+            $this->saveCache($domainValidCache, false);
+
+            $this->froshMailAddressTesterLogger->error(\sprintf('Domain %s has no mx records', $domain));
+
+            return false;
+        }
+
+        if ($this->systemConfigService->getString('FroshMailAddressTester.config.level') !== 'smtp') {
+            return true;
+        }
+
+        $verifyEmail = $this->systemConfigService->getString('FroshMailAddressTester.config.verifyEmail');
+        if ($verifyEmail !== '') {
+            $smtpCheck = new SMTP($verifyEmail);
+        } else {
+            $smtpCheck = new SMTP();
+        }
+
+        $smtpResult = $smtpCheck->check($domain, $mxRecords, $email);
+        $this->saveCache($domainValidCache, $smtpResult->canConnect);
+
+        if ($smtpResult->canConnect === false) {
+            $this->froshMailAddressTesterLogger->error($smtpResult->error);
+
+            return false;
+        }
+
+        $isValid = $smtpResult->isDeliverable === true && $smtpResult->isDisabled === false && $smtpResult->hasFullInbox === false;
+
+        $this->saveCache($mailValidCache, $isValid);
+
+        if ($isValid === false) {
+            $this->froshMailAddressTesterLogger->error(
+                \sprintf('Email address "%s" test failed', $email),
+                json_decode(json_encode($smtpResult, \JSON_THROW_ON_ERROR), true, 1, \JSON_THROW_ON_ERROR)
+            );
+        }
+
+        return $isValid;
+    }
+
+    private function getCacheItem(string $value): CacheItemInterface
+    {
+        $cacheKey = 'frosh_mail_tester_' . Hasher::hash($value);
+
+        return $this->cache->getItem($cacheKey);
+    }
+
+    private function saveCache(CacheItemInterface $item, bool $value): void
+    {
+        $cacheTime = 3600;
+
+        if ($value === true) {
+            $cacheTime = 86400; // one day for valid emails
+        }
+
+        $item->expiresAfter($cacheTime);
+        $item->set($value);
+        $this->cache->save($item);
+    }
+}
diff --git a/src/Service/Validator.php b/src/Service/Validator.php
deleted file mode 100644
index 7e855d3..0000000
--- a/src/Service/Validator.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php declare(strict_types=1);
-
-namespace Frosh\MailValidation\Service;
-
-use Psr\Log\LoggerInterface;
-use Shopware\Core\Framework\Util\Hasher;
-use Shopware\Core\System\SystemConfig\SystemConfigService;
-use Shyim\CheckIfEmailExists\EmailChecker;
-use Shyim\CheckIfEmailExists\SMTP;
-use Shyim\CheckIfEmailExists\Syntax;
-use Symfony\Component\Cache\Adapter\AdapterInterface;
-use Symfony\Contracts\Cache\CacheInterface;
-use Symfony\Contracts\Cache\ItemInterface;
-
-class Validator
-{
-    public function __construct(
-        private readonly SystemConfigService $systemConfigService,
-        private readonly CacheInterface $cache,
-        private readonly LoggerInterface $froshMailValidationLogger,
-    ) {
-    }
-
-    public function validateEmail(string $email): bool
-    {
-        $email = \strtolower($email);
-
-        $verifyEmail = $this->systemConfigService->getString('FroshMailValidation.config.verifyEmail');
-
-        $syntax = new Syntax($email);
-        if ($syntax->isValid() === false) {
-            return false;
-        }
-
-        $domain = $syntax->domain;
-
-        $domainCacheKey = 'frosh_mail_validation_domain_' . Hasher::hash($domain);
-
-        \assert($this->cache instanceof AdapterInterface);
-        $domainValidCache = $this->cache->getItem($domainCacheKey);
-
-        // first check if the domain is already marked as invalid
-        if ($domainValidCache->get() === false) {
-            return false;
-        }
-
-        $checker = new EmailChecker(smtp: new SMTP($verifyEmail));
-
-        $emailCacheKey = 'frosh_mail_validation_email_' . Hasher::hash($email);
-
-        return $this->cache->get($emailCacheKey, function (ItemInterface $cacheItem) use ($email, $checker, $domainValidCache) {
-            $result = $checker->check($email);
-
-            $domainValid = $result->hasMxRecords && $result->isReachable;
-            $domainValidCache->set($domainValid);
-            $domainValidCache->expiresAfter($domainValid ? 86400 : 3600);
-            $this->cache->save($domainValidCache);
-
-            $cacheItem->expiresAfter(3600);
-
-            if ($domainValid && $result->isDisabled === false && $result->hasFullInbox === false) {
-                return true;
-            }
-
-            $this->froshMailValidationLogger->error('Email validation failed', $result->toArray());
-
-            return false;
-        });
-    }
-}
diff --git a/src/Subscriber/BuildValidationEventListener.php b/src/Subscriber/BuildValidationEventListener.php
index 15c0a5e..989a41a 100644
--- a/src/Subscriber/BuildValidationEventListener.php
+++ b/src/Subscriber/BuildValidationEventListener.php
@@ -1,8 +1,8 @@
 <?php declare(strict_types=1);
 
-namespace Frosh\MailValidation\Subscriber;
+namespace Frosh\MailAddressTester\Subscriber;
 
-use Frosh\MailValidation\Constraint\TestEmail;
+use Frosh\MailAddressTester\Constraint\TestEmail;
 use Shopware\Core\Framework\Validation\BuildValidationEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;