Harrison/msg files (#2375)

Co-authored-by: Sahil Masand <masand.sahil@gmail.com>
Co-authored-by: Sahil Masand <masands@cbh.com.au>

docs/modules/indexes/document_loaders/examples/email.ipynb

@@ -7,7 +7,15 @@
    "source": [
     "# Email\n",
     "\n",
-    "This notebook shows how to load email (`.eml`) files."
+    "This notebook shows how to load email (`.eml`) and Microsoft Outlook (`.msg`) files."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89caa348",
+   "metadata": {},
+   "source": [
+    "## Using Unstructured"
    ]
   },
   {
@@ -66,7 +74,7 @@
    "id": "8bf50cba",
    "metadata": {},
    "source": [
-    "## Retain Elements\n",
+    "### Retain Elements\n",
     "\n",
     "Under the hood, Unstructured creates different \"elements\" for different chunks of text. By default we combine those together, but you can easily keep that separation by specifying `mode=\"elements\"`."
    ]
@@ -112,10 +120,69 @@
     "data[0]"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "6a074515",
+   "metadata": {},
+   "source": [
+    "## Using OutlookMessageLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "1e7a8444",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import OutlookMessageLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "77a055e6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "loader = OutlookMessageLoader('example_data/fake-email.msg')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "789882de",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "data = loader.load()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "46aa0632",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Document(page_content='This is a test email to experiment with the MS Outlook MSG Extractor\\r\\n\\r\\n\\r\\n-- \\r\\n\\r\\n\\r\\nKind regards\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nBrian Zhou\\r\\n\\r\\n', metadata={'subject': 'Test for TIF files', 'sender': 'Brian Zhou <brizhou@gmail.com>', 'date': 'Mon, 18 Nov 2013 16:26:24 +0800'})"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "data[0]"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "6a074515",
+   "id": "2b223ce2",
    "metadata": {},
    "outputs": [],
    "source": []