diff --git a/src/web/server/admin/extension_maestro.php b/src/web/server/admin/extension_maestro.php
index dded495..06c1b46 100644
--- a/src/web/server/admin/extension_maestro.php
+++ b/src/web/server/admin/extension_maestro.php
@@ -6,7 +6,7 @@ include "./../lib/send_reply_json.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_log.php";
 include "./../lib/maestro_account_info.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 // include "./../mail/send_mail.php";
 include "./../mail/send_naver_mail.php";
 
diff --git a/src/web/server/admin/register_maestro.php b/src/web/server/admin/register_maestro.php
index 9c17fe0..62c6fb7 100644
--- a/src/web/server/admin/register_maestro.php
+++ b/src/web/server/admin/register_maestro.php
@@ -6,7 +6,7 @@ include "./../setup/connect_db.php";
 include "./../lib/maestro_account_info.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_log.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 // include "./../mail/send_mail.php";
 include "./../mail/send_naver_mail.php";
 
diff --git a/src/web/server/maestro/add_maestro.php b/src/web/server/maestro/add_maestro.php
index 3739c6f..d40db64 100644
--- a/src/web/server/maestro/add_maestro.php
+++ b/src/web/server/maestro/add_maestro.php
@@ -1,12 +1,15 @@
 <?php
 header("Content-Type: application/json");
 
+error_reporting( E_ALL );
+ini_set( "display_errors", 1 );
+
 include "./../setup/connect_db.php";
 include "./../lib/send_reply_json.php";
-include "./../lib/maestro_account_info.php";
+// include "./../lib/maestro_account_info.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_log.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 include "./../mail/send_naver_mail.php";
 
 
diff --git a/src/web/server/maestro/request_extension_maestro.php b/src/web/server/maestro/request_extension_maestro.php
index 39eea83..666029f 100644
--- a/src/web/server/maestro/request_extension_maestro.php
+++ b/src/web/server/maestro/request_extension_maestro.php
@@ -5,7 +5,7 @@ include "./../setup/connect_db.php";
 include "./../lib/send_reply_json.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_account_info.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 // include "./../mail/send_mail.php";
 include "./../mail/send_naver_mail.php";
 
diff --git a/src/web/server/maestro/request_upgrade_maestro.php b/src/web/server/maestro/request_upgrade_maestro.php
index d528fe4..28954a5 100644
--- a/src/web/server/maestro/request_upgrade_maestro.php
+++ b/src/web/server/maestro/request_upgrade_maestro.php
@@ -5,7 +5,7 @@ include "./../setup/connect_db.php";
 include "./../lib/send_reply_json.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_account_info.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 // include "./../mail/send_mail.php";
 include "./../mail/send_naver_mail.php";
 
diff --git a/src/web/server/maestro/update_maestro_info.php b/src/web/server/maestro/update_maestro_info.php
index acda5d5..fbcf1e9 100644
--- a/src/web/server/maestro/update_maestro_info.php
+++ b/src/web/server/maestro/update_maestro_info.php
@@ -6,7 +6,7 @@ include "./../setup/connect_db.php";
 include "./../lib/maestro_account_info.php";
 include "./../lib/db_maestro.php";
 include "./../lib/maestro_log.php";
-include "./../mail/mail_setting.php";
+// include "./../mail/mail_setting.php";
 // include "./../mail/send_mail.php";
 include "./../mail/send_naver_mail.php";
 
diff --git a/src/web/server/mail/mail_contents.php b/src/web/server/mail/mail_contents.php
index eaa3448..a241393 100644
--- a/src/web/server/mail/mail_contents.php
+++ b/src/web/server/mail/mail_contents.php
@@ -9,12 +9,12 @@ $bodyMap['registrationBankInfo'] = "안녕하세요.<br/>".
 "<br/>".
 "신청하신 마에스트로 계정 내용은 아래와 같습니다.<br/>".
 "1) 아이디 : {{maestro_name}}<br/>".
-"2) 요금제 : {{student_count}}명 ({{price}}만원)<br/>".
+"2) 요금제 : {{student_count}}명 ({{price}}원)<br/>".
 "<br/>".
 "계정 등록을 위한 은행 계좌 입금 정보는 아래와 같습니다.<br/>".
 "------------------------------------------------------------<br/>".
 "* 은행 계좌 : {{bank_account_no}} ( 카카오뱅크, 예금주 : 박지상 )<br/>".
-"* 금액 : {{price}}만원<br/>".
+"* 금액 : {{price}}원<br/>".
 "* 송금자명 : {{maestro_name}} (신청하신 마에스트로 아이디)<br/>".
 "                   ☞ 빠른 입금 확인을 위해, 송금자명을 본인 이름 대신 위와 같이 아이디로 부탁드립니다 ☜<br/>".
 "------------------------------------------------------------<br/>".
@@ -75,7 +75,7 @@ $bodyMap['closedBetaRegistrationBankInfo'] = "안녕하세요.<br/>".
 "<br/>".
 "신청하신 마에스트로 계정 내용은 아래와 같습니다.<br/>".
 "1) 아이디 : {{maestro_name}}<br/>".
-"2) 요금제 : {{student_count}}명 ({{price}}만원)<br/>".
+"2) 요금제 : {{student_count}}명 ({{price}}원)<br/>".
 "<br/>".
 "계정 신청 내역이 확인되는대로 마에스트로 아이디를 활성화 해드리겠습니다.<br/>".
 "현재 수작업으로 확인하고 활성화하고 있어서 시간이 조금 걸리는 점 양해 부탁드립니다.<br/>".
@@ -108,7 +108,7 @@ $bodyMap['extensionBankInfo'] = "안녕하세요.<br/>".
 "[초코마에] 마에스트로 계정 유효기간 연장을 신청해주셔서 감사합니다.<br/>".
 "<br/>".
 "{{maestro_name}} - 마에스트로 계정의 현재 요금제와 유효기간은 아래와 같습니다.<br/>".
-"1) 현재 사용중인 요금제 : {{student_count}}명 ({{price}}만원)<br/>".
+"1) 현재 사용중인 요금제 : {{student_count}}명 ({{price}}원)<br/>".
 "2) 유효기간 : {{date}}<br/>".
 "<br/>".
 "연장을 신청하실 경우, 새로운 유효기간은 아래와 같습니다.<br/>".
@@ -117,7 +117,7 @@ $bodyMap['extensionBankInfo'] = "안녕하세요.<br/>".
 "계정 유효기간 연장을 위한 은행 계좌 입금 정보는 아래와 같습니다.<br/>".
 "------------------------------------------------------------<br/>".
 "* 은행 계좌 : {{bank_account_no}} ( 카카오뱅크, 예금주 : 박지상 )<br/>".
-"* 금액 : {{price}}만원<br/>".
+"* 금액 : {{price}}원<br/>".
 "* 송금자명 : {{maestro_name}} (신청하신 마에스트로 아이디)<br/>".
 "                   ☞ 빠른 입금 확인을 위해, 송금자명을 본인 이름 대신 위와 같이 아이디로 부탁드립니다 ☜<br/>".
 "------------------------------------------------------------<br/>".
@@ -152,14 +152,14 @@ $bodyMap['upgradeBankInfo'] = "안녕하세요.<br/>".
 "[초코마에] 마에스트로 계정 요금제 업그레이드를 신청해주셔서 감사합니다.<br/>".
 "<br/>".
 "{{maestro_name}} - 마에스트로 계정의 현재 요금제와 업그레이드 요금제는 아래와 같습니다.<br/>".
-"1) 현재 사용중인 요금제 : {{prev_student_count}}명 ({{prev_price}}만원)<br/>".
-"2) 신청하신 업그레이드 요금제 : {{upgrade_student_count}}명 ({{upgrade_price}}만원)<br/>".
+"1) 현재 사용중인 요금제 : {{prev_student_count}}명 ({{prev_price}}원)<br/>".
+"2) 신청하신 업그레이드 요금제 : {{upgrade_student_count}}명 ({{upgrade_price}}원)<br/>".
 "<br/>".
 "<br/>".
 "계정 요금제 업그레이드를 위한 은행 계좌 입금 정보는 아래와 같습니다.<br/>".
 "------------------------------------------------------------<br/>".
 "* 은행 계좌 : {{bank_account_no}} ( 카카오뱅크, 예금주 : 박지상 )<br/>".
-"* 금액 : {{price}}만원<br/>".
+"* 금액 : {{price}}원<br/>".
 "* 송금자명 : {{maestro_name}} (신청하신 마에스트로 아이디)<br/>".
 "                   ☞ 빠른 입금 확인을 위해, 송금자명을 본인 이름 대신 위와 같이 아이디로 부탁드립니다 ☜<br/>".
 "------------------------------------------------------------<br/>".
@@ -180,7 +180,7 @@ $subjectMap['upgradeDone'] = "[초코마에] {{maestro_name}} - 마에스트로
 $bodyMap['upgradeDone'] = "안녕하세요.<br/>".
 "[초코마에] 마에스트로 계정 요금제 업그레이드를 신청해주셔서 감사합니다.<br/>".
 "<br/>".
-"{{maestro_name}} - 마에스트로 계정의 요금제가 [ 50명 (2만원) ] 에서 [ 500명 (4만원) ] 로 업그레이드 되었습니다.<br/>".
+"{{maestro_name}} - 마에스트로 계정의 요금제가 [ 50명 ({{prev_price}}원) ] 에서 [ 500명 ({{price}}원) ] 으로 업그레이드 되었습니다.<br/>".
 "<br/>".
 "* 마에스트로 계정 유효기간이 오늘부터 1년으로 다시 채워졌습니다.<br/>".
 "<br/>".
diff --git a/src/web/server/mail/send_mail_test.php b/src/web/server/mail/send_mail_test.php
index ee88330..c3ca9f3 100644
--- a/src/web/server/mail/send_mail_test.php
+++ b/src/web/server/mail/send_mail_test.php
@@ -1,15 +1,13 @@
 <?php
 header("Content-Type: application/json");
 
-include "./../setup/connect_db.php";
 include "./../lib/send_reply_json.php";
-include "./../lib/maestro_account_info.php";
+include "./../setup/connect_db.php";
 include "./../lib/db_maestro.php";
-include "./mail_setting.php";
+// include "./mail_setting.php";
 // include "./send_mail.php";
 include "./send_naver_mail.php";
 
-/*
 $type = $_POST["type"];
 $maestro_id = $_POST["maestro_id"];
 $maestro_name = $_POST["maestro_name"];
@@ -22,9 +20,7 @@ $upgrade_account_type = $_POST["upgrade_account_type"];
 $registered_account_type = $_POST["registered_account_type"];
 $maestro_name_prev = $_POST["maestro_name_prev"];
 $maestro_email_prev = $_POST["email_prev"];
-*/
 
-/*
 if($type == "sendMailRegisterBankInfo") {
 	$result = sendMailRegisterBankInfo($maestro_name, $maestro_email, $account_type);
 } else if($type == "sendMailRegistered") {
@@ -46,10 +42,8 @@ if($type == "sendMailRegisterBankInfo") {
 	$maestro_data = get_maestro_data($maestro_id);
 	set_data("maestroData", $maestro_data);
 }
-*/
 
-$return = true;
-set_data("sendMailResult", $return);
+set_data("sendMailResult", $result);
 send_result_success();
 
 exit;
diff --git a/src/web/server/mail/send_naver_mail.php b/src/web/server/mail/send_naver_mail.php
index 5081a57..31cb73e 100644
--- a/src/web/server/mail/send_naver_mail.php
+++ b/src/web/server/mail/send_naver_mail.php
@@ -1,49 +1,45 @@
 <?php
 header("Content-Type: application/json");
 
+error_reporting( E_ALL );
+ini_set( "display_errors", 1 );
+
 use PHPMailer\PHPMailer\PHPMailer;
 use PHPMailer\PHPMailer\Exception;
 
 require './../PHPMailer/src/Exception.php';
 require './../PHPMailer/src/PHPMailer.php';
 require './../PHPMailer/src/SMTP.php';
-require './mail_contents.php';
-require './../lib/maestro_account_info.php';
 
+include './mail_setting.php';
+include './mail_contents.php';
+include './../lib/maestro_account_info.php';
+// include_once "./../lib/send_reply_json.php";
 
 // Register
 function sendMailRegisterBankInfo($maestro_name, $maestro_email, $account_type) {
 	global $subjectMap, $bodyMap;
 
     // closed beta
-    /*
     $subject = str_replace("{{maestro_name}}", $maestro_name, $subjectMap['closedBetaRegistrationBankInfo']);
 
     $body = str_replace("{{maestro_name}}", $maestro_name, $bodyMap['closedBetaRegistrationBankInfo']);
     $body = str_replace("{{student_count}}", get_max_player_count($account_type), $body);
-    $body = str_replace("{{price}}", get_price($account_type), $body);
-    */
+    $price = number_format(get_price($account_type));
+    $body = str_replace("{{price}}", $price, $body);
 
-    $subject = "Naver 메일 발신 테스트";
-    $body = "sendMailRegisterBankInfo";
-
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 function sendMailRegisterDone($maestro_name, $maestro_email) {
 	global $subjectMap, $bodyMap;
 
     // closed beta
-    /*
     $subject = str_replace("{{maestro_name}}", $maestro_name, $subjectMap['closedBetaRegistrationDone']);
 
     $body = str_replace("{{maestro_name}}", $maestro_name, $bodyMap['closedBetaRegistrationDone']);
-    */
 
-    $subject = "Naver 메일 발신 테스트";
-    $body = "sendMailRegisterDone";
-
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 
@@ -52,14 +48,14 @@ function sendMailExtensionBankInfo($maestro_name, $available_date, $new_availabl
     $subject = "Naver 메일 발신 테스트";
     $body = "sendMailExtensionBankInfo";
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 function sendMailExtensionDone($maestro_name, $new_available_date, $maestro_email) {
     $subject = "Naver 메일 발신 테스트";
     $body = "sendMailExtensionDone";
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 
@@ -68,30 +64,38 @@ function sendMailUpgradeBankInfo($maestro_name, $maestro_email, $account_type, $
     $subject = "Naver 메일 발신 테스트";
     $body = "sendMailUpgradeBankInfo";
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 function sendMailUpgradeDone($maestro_name, $maestro_email, $account_type, $upgrade_account_type) {
     $subject = "Naver 메일 발신 테스트";
     $body = "sendMailUpgradeDone";
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 
 // Update
 function sendMailUpdateMaestroName($maestro_name, $maestro_name_prev, $maestro_email) {
-    $subject = "Naver 메일 발신 테스트";
-    $body = "sendMailUpdateMaestroName";
+	global $subjectMap, $bodyMap;
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    $subject = str_replace("{{update_maestro_name}}", $maestro_name, $subjectMap['updateMaestroName']);
+
+    $body = str_replace("{{prev_maestro_name}}", $maestro_name_prev, $bodyMap['updateMaestroName']);
+    $body = str_replace("{{update_maestro_name}}", $maestro_name, $body);
+
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 function sendMailUpdateMaestroEmail($maestro_name, $maestro_email, $maestro_email_prev) {
-    $subject = "Naver 메일 발신 테스트";
-    $body = "sendMailUpdateMaestroEmail";
+	global $subjectMap, $bodyMap;
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    $subject = $subjectMap['updateMaestroEmail'];
+
+    $body = str_replace("{{prev_email}}", $maestro_email_prev, $bodyMap['updateMaestroEmail']);
+    $body = str_replace("{{update_email}}", $maestro_email, $body);
+
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
 // experation
@@ -99,10 +103,9 @@ function sendMailExperation30days($maestro_name, $maestro_email, $maestro_email_
     $subject = "Naver 메일 발신 테스트";
     $body = "sendMailExperation30days";
 
-    send_naver_mail($maestro_email, $maestro_name, $subject, $body);
+    return send_naver_mail($maestro_email, $maestro_name, $subject, $body);
 }
 
-
 // Load Composer's autoloader
 // require $_SERVER['DOCUMENT_ROOT'] . '/vendor/autoload.php';
 
@@ -148,10 +151,15 @@ function send_naver_mail($maestro_email, $maestro_name, $subject, $body) {
         $mail->Body    = $body;
 
         $mail->send();
-        echo 'Message has been sent';
+
+        // set_data("message", "Message has been sent");
+        // send_result_success();
+
         return true;
     } catch (Exception $e) {
-        echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
+        // set_error_code("Message could not be sent. Mailer Error: {".$mail->ErrorInfo."}");
+        // send_result_success();
+
         return false;
     }
 }
\ No newline at end of file