I need your help

I am using AWS and ubuntu os 20.04. The web server uses nginx and uses php mail I installed php 7.3 pfm.

I used postfix for mail function and connected to SMTP. It's not Google, it's an e-mail called NAVER Works used in Korea.

On the server

server code

"This is Test" | mail -s "This is the subject" [email protected] - aFrom:[email protected]

I checked that the mail was sent using . But without -aFrom, I couldn't send the mail

After adding, I checked the transfer and called php mail on the React web, but from is always empty In the to part, it's sent as [email protected]

So my problem is this

Why is from=<> when from is set? And I wonder why it is set as www-data.

error code

Nov 25 16:41:52 grigompictures postfix/sendmail[5817]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/postdrop[5818]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/cleanup[5819]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/pickup[5051]: 15DA1BE058: uid=33 from=<www-data>
Nov 25 16:41:52 grigompictures postfix/trivial-rewrite[5820]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/cleanup[5819]: 15DA1BE058: message-id=<20221125074152.15DA1BE058@localhost>
Nov 25 16:41:52 grigompictures postfix/qmgr[5052]: 15DA1BE058: from=<[email protected]>, size=581, nrcpt=1 (queue active)
Nov 25 16:41:52 grigompictures postfix/smtp[5821]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/bounce[5822]: warning: /etc/postfix/main.cf, line 66: overriding earlier entry: smtp_tls_security_level=may
Nov 25 16:41:52 grigompictures postfix/smtp[5821]: 15DA1BE058: to=<[email protected]>, relay=smtp.worksmobile.com[125.209.209.241]:587, delay=0.23, delays=0.02/0.08/0.12/0.01, dsn=5.7.1, status=bounced (host smtp.worksmobile.com[125.209.209.241] said: 554 5.7.1 The sender address is unauthorized oDOdys8sRN6Y7rp0-9gUJg - nsmtp (in reply to MAIL FROM command))
Nov 25 16:41:52 grigompictures postfix/cleanup[5819]: 57876BE05A: message-id=<20221125074152.57876BE05A@localhost>
Nov 25 16:41:52 grigompictures postfix/qmgr[5052]: 57876BE05A: from=<>, size=2672, nrcpt=1 (queue active)
Nov 25 16:41:52 grigompictures postfix/bounce[5822]: 15DA1BE058: sender non-delivery notification: 57876BE05A
Nov 25 16:41:52 grigompictures postfix/qmgr[5052]: 15DA1BE058: removed
Nov 25 16:41:52 grigompictures postfix/smtp[5821]: 57876BE05A: to=<[email protected]>, relay=smtp.worksmobile.com[125.209.209.241]:587, delay=0.11, delays=0/0/0.1/0.01, dsn=5.7.1, status=bounced (host smtp.worksmobile.com[125.209.209.241] said: 554 5.7.1 The sender address is unauthorized XNcP6WgcSGqQfw5Gz7ApyQ - nsmtp (in reply to MAIL FROM command))

php code

<?php
    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS");
    header("Access-Control-Allow-Headers: X-PINGOTHER, Content-Type, Authorization");
    header("Access-Control-Max-Age: 86400");

    $rest_json = file_get_contents("php://input");
    $_POST = json_decode($rest_json, true);

    // company - 회사명
    // number - 회사번호
    // email - 이메일
    // name - 담당자 명
    // phone - 담당자 전화번호
    // message - 메세지

    $to = "[email protected]";
    $subject = "Grigom_Pictures CONTACT MAIL - ".$_POST['company'];

    $contents= nl2br(
        "회사명 : ".$_POST['company']."\n".
        "회사번호 : ".$_POST['number']."\n".
        "이메일 : ".$_POST['email']."\n".
        "담당자 명 : ".$_POST['name']."\n".
        "담당자 전화번호 : ".$_POST['phone']."\n".
        "내용 : ".$_POST['message']."\n"
    );

    $headers = implode("\r\n", [
        "From: [email protected]",
        'MIME-Version: 1.0',
        'Content-Type: text/html; charset=UTF-8',
        'X-Mailer: PHP/' . PHP_VERSION
    ]);
    mail($to, $subject, $contents, $headers);

?>