이메일 인증 The following From address failed, MAIL FROM command failed 어떻게하나요? 채택완료

안녕하세요

config.php

define('G5_SMTP_USE_EXT',  1);

if(defined('G5_SMTP_USE_EXT') && G5_SMTP_USE_EXT == 1){   define('G5_SMTP', 'smtp.naver.com');   define('G5_SMTP_PORT', '465');   define('G5_SMTP_USEAUTH', true);   define('G5_SMTP_USESECURE', 'ssl');   define('G5_SMTP_USER', 'testtest_kr');   define('G5_SMTP_PASS', 'testest123!'); } else {   define('G5_SMTP',      '127.0.0.1');   define('G5_SMTP_PORT', '25'); }

mailer.lib.php

    try {         $mail = new PHPMailer(); // defaults to using php "mail()"         if (defined('G5_SMTP') && G5_SMTP) {             $mail->IsSMTP(); // telling the class to use SMTP             $mail->Host = G5_SMTP; // SMTP server             if(defined('G5_SMTP_PORT') && G5_SMTP_PORT)                $mail->Port = G5_SMTP_PORT;

              $mail->SMTPSecure = G5_SMTP_USESECURE;               $mail->SMTPAuth = G5_SMTP_USEAUTH;               $mail->Host = G5_SMTP;               $mail->Username  = G5_SMTP_USER;               $mail->Password  = G5_SMTP_PASS;         }                  $mail->SMTPDebug = 1;

              $mail->CharSet = 'UTF-8';         $mail->From = $fmail;         $mail->FromName = $fname;         $mail->Subject = $subject;         $mail->AltBody = ""; // optional, comment out and test         $mail->msgHTML($content);         $mail->addAddress($to);

이렇게 수정하였는데

2023-07-11 12:47:34 CLIENT -> SERVER: EHLO new.testtest-1.co.kr 2023-07-11 12:47:34 CLIENT -> SERVER: AUTH LOGIN 2023-07-11 12:47:34 CLIENT -> SERVER: bWFy2aa2V40aW5nbW9uc3Rlcl9rcg== 2023-07-11 12:47:34 CLIENT -> SERVER: I2tke1TAyN5zaI5IQ== 2023-07-11 12:47:34 CLIENT -> SERVER: MAIL FROM: 2023-07-11 12:47:34 SMTP ERROR: MAIL FROM command failed: 554 5.7.1 The sender address is unauthorized 9IWe3qA4oRd4GiaQJ3ikJgBw - nsmtp The following From address failed: testtest.korea@gmail.com : MAIL FROM command failed,The sender address is unauthorized 9IWe1qA4o2RdGiaQa4J3ikJgBw - nsmtp,554, 5.7.1 SMTP server error: MAIL FROM command failed Detail: The sender address is unauthorized 9IWeq4A4oRdGiaQJ53iakJgBw - nsmtp SMTP code: 554 Additional SMTP info: 5.7.1 2023-07-11 12:47:34 CLIENT -> SERVER: QUIT

error 메시지가 뜨는데 어떻게 해야 하나요?