$item->From->Mailbox->EmailAddress is null

[quantrpeter]

hi , trying to get all email, but EmailAddress field is null

$client = new Client($host, $username, $password, $version);
            $client->setTimezone($timezone);
            $client->setCurlOptions(array(CURLOPT_SSL_VERIFYPEER => false));

            $request = new FindItemType();
            $request->ParentFolderIds = new NonEmptyArrayOfBaseFolderIdsType();
            $request->Traversal = ItemQueryTraversalType::SHALLOW;

            // Build the start date restriction.
            $greater_than = new IsGreaterThanOrEqualToType();
            $greater_than->FieldURI = new PathToUnindexedFieldType();
            $greater_than->FieldURI->FieldURI = UnindexedFieldURIType::ITEM_DATE_TIME_RECEIVED;
            $greater_than->FieldURIOrConstant = new FieldURIOrConstantType();
            $greater_than->FieldURIOrConstant->Constant = new ConstantValueType();
            $greater_than->FieldURIOrConstant->Constant->Value = $start_date->format('c');

            // Build the end date restriction;
            $less_than = new IsLessThanOrEqualToType();
            $less_than->FieldURI = new PathToUnindexedFieldType();
            $less_than->FieldURI->FieldURI = UnindexedFieldURIType::ITEM_DATE_TIME_RECEIVED;
            $less_than->FieldURIOrConstant = new FieldURIOrConstantType();
            $less_than->FieldURIOrConstant->Constant = new ConstantValueType();
            $less_than->FieldURIOrConstant->Constant->Value = $end_date->format('c');

            // Build the restriction.
            $request->Restriction = new RestrictionType();
            $request->Restriction->And = new AndType();
            $request->Restriction->And->IsGreaterThanOrEqualTo = $greater_than;
            $request->Restriction->And->IsLessThanOrEqualTo = $less_than;

            // Return all message properties.
            $request->ItemShape = new ItemResponseShapeType();
            $request->ItemShape->BaseShape = DefaultShapeNamesType::ALL_PROPERTIES;

            // Search in the user's inbox.
            $folder_id = new DistinguishedFolderIdType();
            $folder_id->Id = DistinguishedFolderIdNameType::INBOX;
            $request->ParentFolderIds->DistinguishedFolderId[] = $folder_id;

            $response = $client->FindItem($request);

            // Iterate over the results, printing any error messages or message subjects.
            $response_messages = $response->ResponseMessages->FindItemResponseMessage;
            foreach ($response_messages as $response_message) {
                // Make sure the request succeeded.
                if ($response_message->ResponseClass != ResponseClassType::SUCCESS) {
                    $code = $response_message->ResponseCode;
                    $message = $response_message->MessageText;
                    fwrite(
                        STDERR,
                        "Failed to search for messages with \"$code: $message\"\n"
                    );
                    continue;
                }

                // Iterate over the messages that were found, printing the subject for each.
                $items = $response_message->RootFolder->Items->Message;
                foreach ($items as $item) {
                    $subject = $item->Subject;
                    $id = $item->ItemId->Id;
                    echo "from=".$item->From->Mailbox->Name."\n";
                    echo "from=".$item->From->Mailbox->EmailAddress."\n";
                    var_dump($item->From->Mailbox);
                    echo "\t\t\t$subject\n";
                }
            }

object(jamesiarmes\PhpEws\Type\EmailAddressType)#88 (5) {
  ["EmailAddress"]=>
  NULL
  ["ItemId"]=>
  NULL
  ["MailboxType"]=>
  string(6) "OneOff"
  ["Name"]=>
  string(10) "eTender 04"
  ["RoutingType"]=>
  NULL
}