diff --git a/docs/v3/msgraph/emails.md b/docs/v3/msgraph/emails.md
index 0c0837d..d30085b 100644
--- a/docs/v3/msgraph/emails.md
+++ b/docs/v3/msgraph/emails.md
@@ -134,6 +134,14 @@ To view an email call **->find($id)** followed by the id of the email.
 MsGraph::emails()->find($id);
 ```
 
+Retrieve the emails using singleValueExtendedProperties.
+
+```php
+MsGraph::emails()->get([
+  '\$filter' => 'singleValueExtendedProperties/Any(ep: ep/id eq \'String {00020329-0000-0000-C000-000000000046} Name CustomProperty\' and ep/value eq \'CustomValue\')'
+]);
+```
+
 ## Send Email
 
 To send an email the format is different to normal calls. The format is to call multiple methods to set the email properties.
@@ -172,6 +180,22 @@ MsGraph::emails()
 ->send()
 ```
 
+singleValueExtendedProperties() can be used to add custom properties to the email.
+
+```php
+MsGraph::emails()
+->to(['email@domains.com'])
+->subject('the subject')
+->body('the content')
+->singleValueExtendedProperties([
+    [
+        "id" => "String {00020329-0000-0000-C000-000000000046} Name CustomProperty",
+        "value" => "CustomValue"
+    ]
+])
+->send()
+```
+
 ## Forward Email
 
 To forward to an email call **->forward()** and use **->comment()** instead of **->body()**.
@@ -205,7 +229,3 @@ To delete an email call **->delete($id)** followed by the id of the email.
 ```php
 MsGraph::emails()->delete($id);
 ```
-
-
-
-
diff --git a/src/Resources/Emails.php b/src/Resources/Emails.php
index 860977d..b854ed9 100644
--- a/src/Resources/Emails.php
+++ b/src/Resources/Emails.php
@@ -27,6 +27,8 @@ class Emails extends MsGraph
 
     private array $attachments = [];
 
+    private array $singleValueExtendedProperties = [];
+
     public function id(string $id): static
     {
         $this->id = $id;
@@ -83,6 +85,13 @@ public function attachments(array $attachments): static
         return $this;
     }
 
+    public function singleValueExtendedProperties(array $singleValueExtendedProperties): static
+    {
+        $this->singleValueExtendedProperties = $singleValueExtendedProperties;
+
+        return $this;
+    }
+
     public function top(string $top): static
     {
         $this->top = $top;
@@ -246,6 +255,7 @@ protected function prepareEmail(): array
         $cc = $this->cc;
         $bcc = $this->bcc;
         $attachments = $this->attachments;
+        $singleValueExtendedProperties = $this->singleValueExtendedProperties;
 
         $toArray = [];
         foreach ($to as $email) {
@@ -264,14 +274,30 @@ protected function prepareEmail(): array
 
         $attachmentArray = [];
         foreach ($attachments as $file) {
+          if (array_key_exists('name', $file) && array_key_exists('contentBytes', $file)) {
+          $attachmentArray[] = [
+              '@odata.type' => '#microsoft.graph.fileAttachment',
+              'name' => $file['name'],
+              'contentBytes' => $file['contentBytes'],
+            ];
+          } else {
             $path = pathinfo($file);
 
             $attachmentArray[] = [
-                '@odata.type' => '#microsoft.graph.fileAttachment',
-                'name' => $path['basename'],
-                'contentType' => mime_content_type($file),
-                'contentBytes' => base64_encode(file_get_contents($file)),
+              '@odata.type' => '#microsoft.graph.fileAttachment',
+              'name' => $path['basename'],
+              'contentType' => mime_content_type($file),
+              'contentBytes' => base64_encode(file_get_contents($file)),
             ];
+          }
+        }
+
+        $singleValueExtendedPropertiesarray = [];
+        foreach ($singleValueExtendedProperties as $value) {
+          $singleValueExtendedPropertiesarray[] = [
+            'id' => $value['id'],
+            'value' => $value['value'],
+          ];
         }
 
         $envelope = [];