diff --git a/modules/communication/lang/en.php b/modules/communication/lang/en.php
index ed0c26480..1d27975d3 100644
--- a/modules/communication/lang/en.php
+++ b/modules/communication/lang/en.php
@@ -32,6 +32,7 @@ $lang->msg_content_is_null = 'Please enter the content.';
 $lang->msg_allow_message_to_friend = 'Failed to send a message because the recipient accepts messages from friends only.';
 $lang->msg_disallow_message = 'Failed to send a message because the recipient blocked receiving messages.';
 $lang->about_allow_message = 'You can set whether to receive messages or not.';
+$lang->msg_send_mail_privacy = 'Your email address will be exposed to the recipient.';
 $lang->message_notice = 'Send a message to the author about this. If you don\'t write a message, it is not sent.';
 $lang->friends_page_does_not_support = 'Friends in a mobile environment is not supported. Please go to the PC page.';
 $lang->communication_send_message_grant = 'Send Message Grant';
diff --git a/modules/communication/lang/ko.php b/modules/communication/lang/ko.php
index b54c193a7..7d4bfd5f0 100644
--- a/modules/communication/lang/ko.php
+++ b/modules/communication/lang/ko.php
@@ -31,6 +31,7 @@ $lang->msg_title_is_null = '쪽지 제목을 입력해주세요.';
 $lang->msg_content_is_null = '내용을 입력해주세요.';
 $lang->msg_allow_message_to_friend = '친구에게만 쪽지 발송을 허용한 사용자라서 쪽지 발송을 하지 못했습니다.';
 $lang->msg_disallow_message = '쪽지 수신을 거부한 사용자라서 쪽지 발송을 하지 못했습니다.';
+$lang->msg_send_mail_privacy = '보낸이의 메일 주소가 받는이에게 노출될 수 있습니다.';
 $lang->about_allow_message = '쪽지 수신 여부를 결정할 수 있습니다.';
 $lang->message_notice = '저작자에게 쪽지를 발송해서 이 사실을 알립니다. 작성하지 않으면 발송하지 않습니다.';
 $lang->friends_page_does_not_support = '모바일 환경에서는 친구 보기 페이지를 지원하지 않습니다. PC 화면으로 이동하세요.';
diff --git a/modules/communication/skins/default/css/communication.css b/modules/communication/skins/default/css/communication.css
index 35d32db78..0d1c81685 100644
--- a/modules/communication/skins/default/css/communication.css
+++ b/modules/communication/skins/default/css/communication.css
@@ -211,6 +211,7 @@
 .xc .table-striped tbody>tr:nth-child(odd)>th{background-color:#f9f9f9}
 .xc .table-hover tbody tr:hover>td,
 .xc .table-hover tbody tr:hover>th{background-color:#f5f5f5}
+.xc .explanation { display: inline-block; margin-left: 8px; color: #999; }
 /* Pangination */
 .xc .pagination{margin:20px 0}
 .xc .pagination ul{display:inline-block;*display:inline;margin-bottom:0;margin-left:0;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;*zoom:1;-webkit-box-shadow:0 1px 2px rgba(0, 0, 0, 0.05);-moz-box-shadow:0 1px 2px rgba(0, 0, 0, 0.05);box-shadow:0 1px 2px rgba(0, 0, 0, 0.05)}
diff --git a/modules/communication/skins/default/send_message.html b/modules/communication/skins/default/send_message.html
index c77307eec..a48887953 100644
--- a/modules/communication/skins/default/send_message.html
+++ b/modules/communication/skins/default/send_message.html
@@ -22,7 +22,7 @@
 			</tr>
 			<tr>
 				<th scope="row">{$lang->cmd_option}</th>
-				<td><input type="checkbox" value="Y" name="send_mail" /> {$lang->cmd_send_mail}</td>
+				<td><input type="checkbox" value="Y" name="send_mail" /> {$lang->cmd_send_mail} <span class="explanation">{$lang->msg_send_mail_privacy}</span></td>
 			</tr>
 		</table>
 		{$editor}