Alternative fix for Multi Store Emails issue, Fix Async Emails issues, Fix Multiple Email issues.

app/code/Magento/Sales/Model/Order/Email/SenderBuilder.php

@@ -5,9 +5,7 @@
  */
 namespace Magento\Sales\Model\Order\Email;
 
-use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Mail\Template\TransportBuilder;
-use Magento\Framework\Mail\Template\TransportBuilderByStore;
 use Magento\Sales\Model\Order\Email\Container\IdentityInterface;
 use Magento\Sales\Model\Order\Email\Container\Template;
 
@@ -28,29 +26,19 @@ class SenderBuilder
      */
     protected $transportBuilder;
 
-    /**
-     * @var TransportBuilderByStore
-     */
-    private $transportBuilderByStore;
-
     /**
      * @param Template $templateContainer
      * @param IdentityInterface $identityContainer
      * @param TransportBuilder $transportBuilder
-     * @param TransportBuilderByStore $transportBuilderByStore
      */
     public function __construct(
         Template $templateContainer,
         IdentityInterface $identityContainer,
-        TransportBuilder $transportBuilder,
-        TransportBuilderByStore $transportBuilderByStore = null
+        TransportBuilder $transportBuilder
     ) {
         $this->templateContainer = $templateContainer;
         $this->identityContainer = $identityContainer;
         $this->transportBuilder = $transportBuilder;
-        $this->transportBuilderByStore = $transportBuilderByStore ?: ObjectManager::getInstance()->get(
-            TransportBuilderByStore::class
-        );
     }
 
     /**
@@ -110,7 +98,7 @@ protected function configureEmailTemplate()
         $this->transportBuilder->setTemplateIdentifier($this->templateContainer->getTemplateId());
         $this->transportBuilder->setTemplateOptions($this->templateContainer->getTemplateOptions());
         $this->transportBuilder->setTemplateVars($this->templateContainer->getTemplateVars());
-        $this->transportBuilderByStore->setFromByStore(
+        $this->transportBuilder->setFrom(
             $this->identityContainer->getEmailIdentity(),
             $this->identityContainer->getStore()->getId()
         );

app/code/Magento/Sales/Test/Unit/Model/Order/Email/SenderBuilderTest.php

@@ -6,7 +6,6 @@
 
 namespace Magento\Sales\Test\Unit\Model\Order\Email;
 
-use Magento\Framework\Mail\Template\TransportBuilderByStore;
 use Magento\Sales\Model\Order\Email\SenderBuilder;
 
 class SenderBuilderTest extends \PHPUnit\Framework\TestCase
@@ -36,11 +35,6 @@ class SenderBuilderTest extends \PHPUnit\Framework\TestCase
      */
     private $storeMock;
 
-    /**
-     * @var \PHPUnit_Framework_MockObject_MockObject
-     */
-    private $transportBuilderByStore;
-
     protected function setUp()
     {
         $templateId = 'test_template_id';
@@ -82,11 +76,10 @@ protected function setUp()
                 'setTemplateIdentifier',
                 'setTemplateOptions',
                 'setTemplateVars',
+                'setFrom',
             ]
         );
 
-        $this->transportBuilderByStore = $this->createMock(TransportBuilderByStore::class);
-
         $this->templateContainerMock->expects($this->once())
             ->method('getTemplateId')
             ->will($this->returnValue($templateId));
@@ -109,8 +102,8 @@ protected function setUp()
         $this->identityContainerMock->expects($this->once())
             ->method('getEmailIdentity')
             ->will($this->returnValue($emailIdentity));
-        $this->transportBuilderByStore->expects($this->once())
-            ->method('setFromByStore')
+        $this->transportBuilder->expects($this->once())
+            ->method('setFrom')
             ->with($this->equalTo($emailIdentity));
 
         $this->identityContainerMock->expects($this->once())
@@ -120,15 +113,16 @@ protected function setUp()
         $this->senderBuilder = new SenderBuilder(
             $this->templateContainerMock,
             $this->identityContainerMock,
-            $this->transportBuilder,
-            $this->transportBuilderByStore
+            $this->transportBuilder
         );
     }
 
     public function testSend()
     {
         $customerName = 'test_name';
         $customerEmail = 'test_email';
+        $identity = 'email_identity_test';
+
         $transportMock = $this->createMock(
             \Magento\Sales\Test\Unit\Model\Order\Email\Stub\TransportInterfaceMock::class
         );
@@ -151,6 +145,9 @@ public function testSend()
         $this->storeMock->expects($this->once())
             ->method('getId')
             ->willReturn(1);
+        $this->transportBuilder->expects($this->once())
+            ->method('setFrom')
+            ->with($identity, 1);
         $this->transportBuilder->expects($this->once())
             ->method('addTo')
             ->with($this->equalTo($customerEmail), $this->equalTo($customerName));
@@ -164,6 +161,7 @@ public function testSend()
 
     public function testSendCopyTo()
     {
+        $identity = 'email_identity_test';
         $transportMock = $this->createMock(
             \Magento\Sales\Test\Unit\Model\Order\Email\Stub\TransportInterfaceMock::class
         );
@@ -177,6 +175,9 @@ public function testSendCopyTo()
         $this->transportBuilder->expects($this->once())
             ->method('addTo')
             ->with($this->equalTo('example@mail.com'));
+        $this->transportBuilder->expects($this->once())
+            ->method('setFrom')
+            ->with($identity, 1);
         $this->identityContainerMock->expects($this->once())
             ->method('getStore')
             ->willReturn($this->storeMock);

lib/internal/Magento/Framework/Mail/Template/TransportBuilder.php

@@ -164,9 +164,9 @@ public function setReplyTo($email, $name = null)
      * @param string|array $from
      * @return $this
      */
-    public function setFrom($from)
+    public function setFrom($from, $store = null)
     {
-        $result = $this->_senderResolver->resolve($from);
+        $result = $this->_senderResolver->resolve($from, $store);
         $this->message->setFrom($result['email'], $result['name']);
         return $this;
     }

lib/internal/Magento/Framework/Mail/Test/Unit/Template/TransportBuilderTest.php

@@ -156,16 +156,17 @@ public function getTransportDataProvider()
     public function testSetFrom()
     {
         $sender = ['email' => 'from@example.com', 'name' => 'name'];
+        $store = 1;
         $this->senderResolverMock->expects($this->once())
             ->method('resolve')
-            ->with($sender)
+            ->with($sender, $store)
             ->willReturn($sender);
         $this->messageMock->expects($this->once())
             ->method('setFrom')
             ->with('from@example.com', 'name')
             ->willReturnSelf();
 
-        $this->builder->setFrom($sender);
+        $this->builder->setFrom($sender, $store);
     }
 
     /**