Patch-Magento_Email-M2.1.0-create-email-logo-1.patch

--- Model/AbstractTemplate.php
+++ Model/AbstractTemplate.php
@@ -389,7 +389,7 @@ abstract class AbstractTemplate extends AbstractModel implements TemplateTypesIn
             $store
         );
         if ($fileName) {
-            $uploadDir = \Magento\Config\Model\Config\Backend\Email\Logo::UPLOAD_DIR;
+            $uploadDir = \Magento\Email\Model\Design\Backend\Logo::UPLOAD_DIR;
             $mediaDirectory = $this->filesystem->getDirectoryRead(DirectoryList::MEDIA);
             if ($mediaDirectory->isFile($uploadDir . '/' . $fileName)) {
                 return $this->storeManager->getStore()->getBaseUrl(

--- /dev/null
+++ Model/Design/Backend/Logo.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Copyright © 2016 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Email\Model\Design\Backend;
+
+use Magento\Theme\Model\Design\Backend\Logo as DesignLogo;
+
+class Logo extends DesignLogo
+{
+    /**
+     * The tail part of directory path for uploading
+     */
+    const UPLOAD_DIR = 'email/logo';
+
+    /**
+     * Upload max file size in kilobytes
+     *
+     * @var int
+     */
+    protected $maxFileSize = 2048;
+
+    /**
+     * Getter for allowed extensions of uploaded files
+     *
+     * @return string[]
+     */
+    public function getAllowedExtensions()
+    {
+        return ['jpg', 'jpeg', 'gif', 'png'];
+    }
+}

--- etc/di.xml
+++ etc/di.xml
@@ -27,7 +27,7 @@
                 <item name="email_logo" xsi:type="array">
                     <item name="path" xsi:type="string">design/email/logo</item>
                     <item name="fieldset" xsi:type="string">other_settings/email</item>
-                    <item name="backend_model" xsi:type="string">Magento\Theme\Model\Design\Backend\Logo</item>
+                    <item name="backend_model" xsi:type="string">Magento\Email\Model\Design\Backend\Logo</item>
                     <item name="base_url" xsi:type="array">
                         <item name="type" xsi:type="string">media</item>
                         <item name="scope_info" xsi:type="string">1</item>