diff --git a/.github/workflows/store.yml b/.github/workflows/store.yml
index 7b4c748..c3a1288 100644
--- a/.github/workflows/store.yml
+++ b/.github/workflows/store.yml
@@ -2,7 +2,7 @@ name: PackPlugin
 on:
     push:
         branches:
-            - 0.2
+            - 0.3
         tags:
             - '*'
 
diff --git a/CHANGELOG_de-DE.md b/CHANGELOG_de-DE.md
index 3a6a301..e72dd8b 100644
--- a/CHANGELOG_de-DE.md
+++ b/CHANGELOG_de-DE.md
@@ -1,3 +1,6 @@
+# 0.3.0
+* Kompatiblität zu 6.4
+
 # 0.2.2
 * Um die Lesbarkeit zu erhöhen, wurden die Boxen für HTML- und TEXT-Mail erhöht
 * In den Mail-Details wird nun auch die Uhrzeit des Versands angezeigt
diff --git a/CHANGELOG_en-GB.md b/CHANGELOG_en-GB.md
index 614a0fe..5cfafc4 100644
--- a/CHANGELOG_en-GB.md
+++ b/CHANGELOG_en-GB.md
@@ -1,3 +1,8 @@
+# 0.3.0
+
+* Add compatibility for Shopware 6.4
+
+
 # 0.2.2
 * To improve readability, the boxes for HTML and TEXT mail have been raised
 * The time of sending is now also displayed in the mail details
@@ -5,16 +10,16 @@
 
 # 0.2.1
 
-* Absender Name hinzugefügt
-* Standardsortierung zu neueste Einträge geändert
+* Sender name added
+* Default sorting changed to newest entries
 
 # 0.2.0
 
-* Add compability for Shopware 6.3
+* Add compatibility for Shopware 6.3
 
 # 0.1.2
 
-* Add compability for Shopware 6.2
+* Add compatibility for Shopware 6.2
 
 # 0.1.1
 
diff --git a/composer.json b/composer.json
index bfcaeca..9a1d12c 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "frosh/mail-platform-archive",
-  "version": "0.2.2",
+  "version": "0.3.0",
   "description": "Mail Archive",
   "type": "shopware-platform-plugin",
   "license": "MIT",
@@ -40,6 +40,6 @@
     }
   },
   "require": {
-    "shopware/core": "~6.3"
+    "shopware/core": "~6.4.0"
   }
 }
diff --git a/src/Content/MailArchive/MailArchiveDefinition.php b/src/Content/MailArchive/MailArchiveDefinition.php
index 2abbded..3587c76 100644
--- a/src/Content/MailArchive/MailArchiveDefinition.php
+++ b/src/Content/MailArchive/MailArchiveDefinition.php
@@ -44,7 +44,7 @@ protected function defineFields(): FieldCollection
             (new JsonField('receiver', 'receiver'))->addFlags(new Required())->addFlags(new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
             (new StringField('subject', 'subject'))->addFlags(new Required())->addFlags(new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
             (new LongTextField('plainText', 'plainText'))->addFlags(new AllowHtml()),
-            (new LongTextField('htmlText', 'htmlText'))->addFlags(new AllowHtml(), new SearchRanking(SearchRanking::LOW_SEARCH_RAKING)),
+            (new LongTextField('htmlText', 'htmlText'))->addFlags(new AllowHtml(), new SearchRanking(SearchRanking::LOW_SEARCH_RANKING)),
             (new LongTextField('eml', 'eml'))->addFlags(new AllowHtml()),
 
             new FkField('salesChannelId', 'salesChannelId', SalesChannelDefinition::class),
diff --git a/src/Controller/Api/MailResendController.php b/src/Controller/Api/MailResendController.php
index cb297b3..74d005b 100644
--- a/src/Controller/Api/MailResendController.php
+++ b/src/Controller/Api/MailResendController.php
@@ -3,7 +3,7 @@
 namespace Frosh\MailArchive\Controller\Api;
 
 use Frosh\MailArchive\Content\MailArchive\MailArchiveEntity;
-use Shopware\Core\Content\MailTemplate\Service\MailSender;
+use Frosh\MailArchive\Services\MailSender;
 use Shopware\Core\Framework\Context;
 use Shopware\Core\Framework\DataAbstractionLayer\EntityRepositoryInterface;
 use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;
@@ -13,24 +13,17 @@
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Mime\Address;
+use Symfony\Component\Mime\Email;
 use Symfony\Component\Routing\Annotation\Route;
 
 class MailResendController extends AbstractController
 {
-    /**
-     * @var EntityRepositoryInterface
-     */
-    private $mailArchiveRepository;
+    private EntityRepositoryInterface $mailArchiveRepository;
 
-    /**
-     * @var MailSender
-     */
-    private $mailSender;
+    private MailSender $mailSender;
 
-    /**
-     * @var RequestStack
-     */
-    private $requestStack;
+    private RequestStack $requestStack;
 
     public function __construct(EntityRepositoryInterface $mailArchiveRepository, MailSender $mailSender, RequestStack $requestStack)
     {
@@ -41,7 +34,7 @@ public function __construct(EntityRepositoryInterface $mailArchiveRepository, Ma
 
     /**
      * @RouteScope(scopes={"api"})
-     * @Route(path="/api/v{version}/_action/frosh-mail-archive/resend-mail")
+     * @Route(path="/api/_action/frosh-mail-archive/resend-mail")
      */
     public function resend(Request $request)
     {
@@ -60,22 +53,20 @@ public function resend(Request $request)
 
         $this->requestStack->getMasterRequest()->attributes->set(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_ID, $mailArchive->getSalesChannelId());
 
-        $message = new \Swift_Message();
+        $message = new Email();
 
         foreach ($mailArchive->getReceiver() as $mail => $name) {
-            $message->addTo($mail, $name);
+            $message->addTo(new Address($mail, $name));
         }
 
-        $message->setFrom($mailArchive->getSender());
-        $message->setSubject($mailArchive->getSubject());
-
-        if (!empty($mailArchive->getPlainText())) {
-            $message->addPart($mailArchive->getPlainText(), 'text/plain');
+        foreach ($mailArchive->getSender() as $mail => $name) {
+            $message->from(new Address($mail, $name));
         }
 
-        if (!empty($mailArchive->getHtmlText())) {
-            $message->addPart($mailArchive->getHtmlText(), 'text/html');
-        }
+        $message->subject($mailArchive->getSubject());
+
+        $message->html($mailArchive->getHtmlText());
+        $message->text($mailArchive->getPlainText());
 
         $this->mailSender->send($message);
 
diff --git a/src/Migration/Migration1575569953createTable.php b/src/Migration/Migration1575569953createTable.php
index afce0b0..8b4fe77 100644
--- a/src/Migration/Migration1575569953createTable.php
+++ b/src/Migration/Migration1575569953createTable.php
@@ -14,7 +14,7 @@ public function getCreationTimestamp(): int
 
     public function update(Connection $connection): void
     {
-        $connection->executeQuery('CREATE TABLE `frosh_mail_archive` (
+        $connection->executeStatement('CREATE TABLE `frosh_mail_archive` (
     `id` BINARY(16) NOT NULL,
     `sender` VARCHAR(255) NOT NULL,
     `receiver` JSON NOT NULL,
diff --git a/src/Migration/Migration1598204175SenderToJson.php b/src/Migration/Migration1598204175SenderToJson.php
index 18fde6c..59ca108 100644
--- a/src/Migration/Migration1598204175SenderToJson.php
+++ b/src/Migration/Migration1598204175SenderToJson.php
@@ -14,8 +14,8 @@ public function getCreationTimestamp(): int
 
     public function update(Connection $connection): void
     {
-        $connection->executeUpdate('UPDATE frosh_mail_archive SET sender = JSON_OBJECT(sender, \'\')');
-        $connection->executeUpdate('ALTER TABLE `frosh_mail_archive`
+        $connection->executeStatement('UPDATE frosh_mail_archive SET sender = JSON_OBJECT(sender, \'\')');
+        $connection->executeStatement('ALTER TABLE `frosh_mail_archive`
 CHANGE `sender` `sender` json NOT NULL AFTER `id`;');
     }
 
diff --git a/src/Resources/app/administration/src/module/frosh-mail-archive/index.js b/src/Resources/app/administration/src/module/frosh-mail-archive/index.js
index 78b26d7..454d3c0 100644
--- a/src/Resources/app/administration/src/module/frosh-mail-archive/index.js
+++ b/src/Resources/app/administration/src/module/frosh-mail-archive/index.js
@@ -6,7 +6,7 @@ Shopware.Module.register('frosh-mail-archive', {
     name: 'frosh-mail-archive.title',
     title: 'frosh-mail-archive.title',
     description: '',
-    color: '#62ff80',
+    color: '#243758',
     icon: 'default-communication-envelope',
 
     routes: {
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index 2bfcc91..450be80 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -11,7 +11,7 @@
             <tag name="shopware.entity.definition" entity="frosh_mail_archive"/>
         </service>
 
-        <service id="Frosh\MailArchive\Services\MailSender" public="true" decorates="Shopware\Core\Content\MailTemplate\Service\MailSender">
+        <service id="Frosh\MailArchive\Services\MailSender" public="true" decorates="Shopware\Core\Content\Mail\Service\MailSender">
             <argument type="service" id="Frosh\MailArchive\Services\MailSender.inner"/>
             <argument type="service" id="request_stack"/>
             <argument type="service" id="frosh_mail_archive.repository"/>
diff --git a/src/Services/MailSender.php b/src/Services/MailSender.php
index dd032a6..ff693f2 100644
--- a/src/Services/MailSender.php
+++ b/src/Services/MailSender.php
@@ -2,79 +2,58 @@
 
 namespace Frosh\MailArchive\Services;
 
-use Shopware\Core\Content\MailTemplate\Service\MailSender as ShopwareMailSender;
+use Shopware\Core\Checkout\Customer\CustomerEntity;
+use Shopware\Core\Content\Mail\Service\AbstractMailSender;
+use Shopware\Core\Content\Mail\Service\AbstractMailService;
 use Shopware\Core\Framework\Context;
 use Shopware\Core\Framework\DataAbstractionLayer\EntityRepositoryInterface;
 use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;
 use Shopware\Core\Framework\DataAbstractionLayer\Search\Filter\EqualsAnyFilter;
 use Shopware\Core\Framework\Uuid\Uuid;
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Mailer\Envelope;
+use Symfony\Component\Mime\Address;
+use Symfony\Component\Mime\Email;
 
-class MailSender extends ShopwareMailSender
+class MailSender extends AbstractMailSender
 {
-    /**
-     * @var MailSender
-     */
-    private $mailSender;
+    private AbstractMailSender $mailSender;
 
-    /**
-     * @var RequestStack
-     */
-    private $requestStack;
+    private RequestStack $requestStack;
 
-    /**
-     * @var EntityRepositoryInterface
-     */
-    private $mailArchiveRepository;
+    private EntityRepositoryInterface $mailArchiveRepository;
 
-    /**
-     * @var EntityRepositoryInterface
-     */
-    private $customerRepository;
+    private EntityRepositoryInterface $customerRepository;
 
     public function __construct(
-        ShopwareMailSender $mailSender,
+        AbstractMailSender $mailSender,
         RequestStack $requestStack,
         EntityRepositoryInterface $mailArchiveRepository,
         EntityRepositoryInterface $customerRepository
-    )
-    {
+    ) {
         $this->mailSender = $mailSender;
         $this->requestStack = $requestStack;
         $this->mailArchiveRepository = $mailArchiveRepository;
         $this->customerRepository = $customerRepository;
     }
 
-    public function send(\Swift_Message $message): void
+    public function send(Email $email, ?Envelope $envelope = null): void
     {
-        $this->saveMail($message);
+        $this->saveMail($email);
 
-        $this->mailSender->send($message);
+        $this->mailSender->send($email, $envelope);
     }
 
-    private function saveMail(\Swift_Message $message): void
+    private function saveMail(Email $message): void
     {
-        $plain = null;
-        $html = null;
-
-        foreach ($message->getChildren() as $child) {
-            if ($child->getBodyContentType() === 'text/html') {
-                $html = $child->getBody();
-                continue;
-            }
-            if ($child->getBodyContentType() === 'text/plain') {
-                $plain = $child->getBody();
-            }
-        }
-
         $this->mailArchiveRepository->create([
             [
                 'id' => Uuid::randomHex(),
-                'sender' => $message->getFrom(),
-                'receiver' => $message->getTo(),
+                'sender' => [$message->getFrom()[0]->getAddress() => $message->getFrom()[0]->getName()],
+                'receiver' => $this->convertAddress($message->getTo()),
                 'subject' => $message->getSubject(),
-                'plainText' => nl2br($plain),
-                'htmlText' => $html,
+                'plainText' => nl2br($message->getTextBody()),
+                'htmlText' => $message->getHtmlBody(),
                 'eml' => $message->toString(),
                 'salesChannelId' => $this->getCurrentSalesChannelId(),
                 'customerId' => $this->getCustomerIdByMail(array_keys($message->getTo()))
@@ -91,11 +70,31 @@ private function getCurrentSalesChannelId(): ?string
         return $this->requestStack->getMasterRequest()->attributes->get('sw-sales-channel-id');
     }
 
-    private function getCustomerIdByMail(array $mails)
+    private function getCustomerIdByMail(array $mails): ?string
     {
         $criteria = new Criteria();
 
         $criteria->addFilter(new EqualsAnyFilter('email', $mails));
         return $this->customerRepository->searchIds($criteria, Context::createDefaultContext())->firstId();
     }
+
+    public function getDecorated(): AbstractMailSender
+    {
+        return $this->mailSender;
+    }
+
+    /**
+     * @param Address[] $addresses
+     * @return array
+     */
+    private function convertAddress(array $addresses): array
+    {
+        $list = [];
+
+        foreach ($addresses as $address) {
+            $list[$address->getAddress()] = $address->getName();
+        }
+
+        return $list;
+    }
 }