symfony
diff --git a/‎src/Symfony/Component/Mailer/Bridge/Sendgrid/Tests/Transport/SendgridApiTransportTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Sendgrid/Tests/Transport/SendgridApiTransportTest.php
+41Lines changed: 41 additions & 0 deletions b/‎src/Symfony/Component/Mailer/Bridge/Sendgrid/Tests/Transport/SendgridApiTransportTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Sendgrid/Tests/Transport/SendgridApiTransportTest.php
+41Lines changed: 41 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Mailer/Bridge/Sendgrid/Transport/SendgridApiTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Sendgrid/Transport/SendgridApiTransport.php
+1-1Lines changed: 1 addition & 1 deletion b/‎src/Symfony/Component/Mailer/Bridge/Sendgrid/Transport/SendgridApiTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Sendgrid/Transport/SendgridApiTransport.php
+1-1Lines changed: 1 addition & 1 deletion
@@ -245,4 +245,45 @@ public function testTagAndMetadataHeaders()
         $this->assertSame('blue', $payload['personalizations'][0]['custom_args']['Color']);
         $this->assertSame('12345', $payload['personalizations'][0]['custom_args']['Client-ID']);
     }
+
+    public function testInlineWithCustomContentId()
+    {
+        $imagePart = (new DataPart('text-contents', 'text.txt'));
+        $imagePart->asInline();
+        $imagePart->setContentId('content-identifier@symfony');
+
+        $email = new Email();
+        $email->addPart($imagePart);
+        $envelope = new Envelope(new Address('alice@system.com'), [new Address('bob@system.com')]);
+
+        $transport = new SendgridApiTransport('ACCESS_KEY');
+        $method = new \ReflectionMethod(SendgridApiTransport::class, 'getPayload');
+        $payload = $method->invoke($transport, $email, $envelope);
+
+        $this->assertArrayHasKey('attachments', $payload);
+        $this->assertCount(1, $payload['attachments']);
+        $this->assertArrayHasKey('content_id', $payload['attachments'][0]);
+
+        $this->assertSame('content-identifier@symfony', $payload['attachments'][0]['content_id']);
+    }
+
+    public function testInlineWithoutCustomContentId()
+    {
+        $imagePart = (new DataPart('text-contents', 'text.txt'));
+        $imagePart->asInline();
+
+        $email = new Email();
+        $email->addPart($imagePart);
+        $envelope = new Envelope(new Address('alice@system.com'), [new Address('bob@system.com')]);
+
+        $transport = new SendgridApiTransport('ACCESS_KEY');
+        $method = new \ReflectionMethod(SendgridApiTransport::class, 'getPayload');
+        $payload = $method->invoke($transport, $email, $envelope);
+
+        $this->assertArrayHasKey('attachments', $payload);
+        $this->assertCount(1, $payload['attachments']);
+        $this->assertArrayHasKey('content_id', $payload['attachments'][0]);
+
+        $this->assertSame('text.txt', $payload['attachments'][0]['content_id']);
+    }
 }
@@ -179,7 +179,7 @@ private function getAttachments(Email $email): array
             ];
 
             if ('inline' === $disposition) {
-                $att['content_id'] = $filename;
+                $att['content_id'] = $attachment->hasContentId() ? $attachment->getContentId() : $filename;
             }
 
             $attachments[] = $att;
Original file line number	Diff line number	Diff line change
`@@ -179,7 +179,7 @@ private function getAttachments(Email $email): array`
`179`	`179`	`];`
`180`	`180`
`181`	`181`	`if ('inline' === $disposition) {`
`182`		`- $att['content_id'] = $filename;`
	`182`	`+ $att['content_id'] = $attachment->hasContentId() ? $attachment->getContentId() : $filename;`
`183`	`183`	`}`
`184`	`184`
`185`	`185`	`$attachments[] = $att;`