Pak syafril, ingin bertanya, jika gagal kirim email dengan pesan ini apa
penyebab nya?

terimakasih

This is the mail system at host canopus.idgx.net.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<[email protected]>: host relayhost.dutaint.com[180.235.150.140] said:
    530 5.7.0 Authentication required (in reply to MAIL FROM command)

Reporting-MTA: dns; canopus.idgx.net
X-Postfix-Queue-ID: 141CAC0472
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Tue, 14 Jan 2025 01:15:47 +0000 (UTC)

Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.0
Remote-MTA: dns; relayhost.dutaint.com
Diagnostic-Code: smtp; 530 5.7.0 Authentication required

-- 
--[mdaemon-l]----------------------------------------------------------
Milis ini untuk Diskusi antar pengguna MDaemon Mail Server di Indonesia

Netiket: https://wiki.openstack.org/wiki/MailingListEtiquette
Arsip: http://mdaemon-l.dutaint.com
Dokumentasi : http://mdaemon.dutaint.com
Berlangganan: Kirim mail ke [email protected]
Henti Langgan: Kirim mail ke [email protected]
Versi terakhir: MDaemon 24.5.2, SecurityGateway 10.5.2

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