diff --git a/notifications/inc/class.notifications_email.inc.php b/notifications/inc/class.notifications_email.inc.php
index 2063e5ba59..a55534eca2 100644
--- a/notifications/inc/class.notifications_email.inc.php
+++ b/notifications/inc/class.notifications_email.inc.php
@@ -99,20 +99,17 @@ class notifications_email implements notifications_iface {
 		//error_log(__METHOD__.__LINE__.array2string($_attachments));
 		if ($_attachments && stripos($_attachments[0]->type,"text/calendar; method=")!==false)
 		{
-			$this->mail->Body = $body_plain;
-			$this->mail->AltBody = $_attachments[0]->string;
-			$this->mail->AltBodyContentType = $_attachments[0]->type;
+			$this->mail->AltExtended = $_attachments[0]->string;
+			$this->mail->AltExtendedContentType = $_attachments[0]->type;
+			unset($_attachments[0]);
 		}
-		else
-		{
-			$this->mail->IsHTML(true);
-			$this->mail->Body = $body_html;
-			$this->mail->AltBody = $body_plain;
-			if(is_array($_attachments) && count($_attachments) > 0) {
-				foreach($_attachments as $attachment) {
-					$this->mail->AddStringAttachment($attachment->string, $attachment->filename, $attachment->encoding, $attachment->type);
-		  		}
-			}
+		$this->mail->IsHTML(true);
+		$this->mail->Body = $body_html;
+		$this->mail->AltBody = $body_plain;
+		if(is_array($_attachments) && count($_attachments) > 0) {
+			foreach($_attachments as $attachment) {
+				$this->mail->AddStringAttachment($attachment->string, $attachment->filename, $attachment->encoding, $attachment->type);
+	  		}
 		}
 		if(!$error=$this->mail->Send()) {
 			throw new Exception("Failed sending notification message via email.$error".print_r($this->mail->ErrorInfo,true));
diff --git a/phpgwapi/inc/class.phpmailer.inc.php b/phpgwapi/inc/class.phpmailer.inc.php
index 8dfda812ea..5c6cec06cf 100644
--- a/phpgwapi/inc/class.phpmailer.inc.php
+++ b/phpgwapi/inc/class.phpmailer.inc.php
@@ -136,6 +136,21 @@ class PHPMailer {
    */
   public $AltBody           = '';
 
+  /**
+   * Sets the ContentType of the AltExtended; default is text/plain
+   * usually used by text/calendar Invitations/Metting requests
+   * @var string
+   */
+  public $AltExtendedContentType = 'text/plain';
+
+  /**
+   * Sets the text-only body of the message.  This automatically sets the
+   * email to multipart/alternative. This is used to send calendar meeting requests as 
+   * Outlook does. It adds an 3rd alternative part to multipart/alternative 
+   * @var string
+   */
+  public $AltExtended       = '';
+
   /**
    * Sets word wrapping on the body of the message to a given number of
    * characters.
@@ -598,7 +613,7 @@ class PHPMailer {
       }
 
       // Set whether the message is multipart/alternative
-      if(!empty($this->AltBody)) {
+      if(!empty($this->AltBody) || !empty($this->AltExtended)) {
         $this->ContentType = 'multipart/alternative';
       }
 
@@ -1112,6 +1127,7 @@ class PHPMailer {
       case 'alt':
       case 'alt_attachments':
         $this->AltBody = $this->WrapText($this->AltBody, $this->WordWrap);
+		if (!empty($this->AltExtended)) $this->AltExtended = $this->WrapText($this->AltExtended, $this->WordWrap);
         break;
       default:
         $this->Body = $this->WrapText($this->Body, $this->WordWrap);
@@ -1258,6 +1274,12 @@ class PHPMailer {
         $body .= $this->GetBoundary($this->boundary[1], '', $this->BodyContentType, ''); //is dependent on IsHTML
         $body .= $this->EncodeString($this->Body, $this->Encoding);
         $body .= $this->LE.$this->LE;
+        if (!empty($this->AltExtended))
+        {
+            $body .= $this->GetBoundary($this->boundary[1], '', $this->AltExtendedContentType, ''); // may be set by client, defaults to text/plain
+            $body .= $this->EncodeString($this->AltExtended, $this->Encoding);
+            $body .= $this->LE.$this->LE;
+        }
         $body .= $this->EndBoundary($this->boundary[1]);
         break;
       case 'plain':
@@ -1278,6 +1300,12 @@ class PHPMailer {
         $body .= $this->GetBoundary($this->boundary[2], '', 'text/html', '') . $this->LE; // Create the HTML body
         $body .= $this->EncodeString($this->Body, $this->Encoding);
         $body .= $this->LE.$this->LE;
+        if (!empty($this->AltExtended))
+        {
+            $body .= $this->GetBoundary($this->boundary[2], '', $this->AltExtendedContentType, ''); // may be set by client, defaults to text/plain
+            $body .= $this->EncodeString($this->AltExtended, $this->Encoding);
+            $body .= $this->LE.$this->LE;
+        }
         $body .= $this->EndBoundary($this->boundary[2]);
         $body .= $this->AttachAll();
         break;
@@ -1365,10 +1393,10 @@ class PHPMailer {
       if(count($this->attachment) > 0) {
         $this->message_type = 'attachments';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) < 1) {
+      if((strlen($this->AltBody) > 0 || strlen($this->AltExtended) > 0 ) && count($this->attachment) < 1) {
         $this->message_type = 'alt';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) > 0) {
+      if((strlen($this->AltBody) > 0 || strlen($this->AltExtended) > 0 ) && count($this->attachment) > 0) {
         $this->message_type = 'alt_attachments';
       }
     }
@@ -2005,7 +2033,7 @@ class PHPMailer {
   public function getMessageHeader() {
 	if(!isset($this->sentHeader)) {
 		// Set whether the message is multipart/alternative
-		if(!empty($this->AltBody)) $this->ContentType = "multipart/alternative";
+		if(!empty($this->AltBody) || !empty($this->AltExtended)) $this->ContentType = "multipart/alternative";
 
 		$this->SetMessageType();
 		$header = $this->CreateHeader();
@@ -2018,7 +2046,7 @@ class PHPMailer {
   public function getMessageBody() {
 	if(!isset($this->sentBody)) {
 		// Set whether the message is multipart/alternative
-		if(!empty($this->AltBody)) $this->ContentType = "multipart/alternative";
+		if(!empty($this->AltBody) || !empty($this->AltExtended)) $this->ContentType = "multipart/alternative";
 
 		$this->SetMessageType();
 		$body = $this->CreateBody();