Selamat sore, Mau tanya Pak, user saya ada kirim email dan dapat balasan seperti dibawah ini :
-----Original Message----- From: Mail Delivery System [mailto:mailer-dae...@mxin3.dnetsurabaya.id <mailer-dae...@mxin3.dnetsurabaya.id>] Sent: Wednesday, January 30, 2019 3:11 PM To: indrasoegia...@indokemika.co.id Subject: Undelivered Mail Returned to Sender This is the mail system at host mxin3.dnetsurabaya.id. 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 <af...@berlina.co.id>: host 202.148.6.99[202.148.6.99] said: 550-Please turn on SMTP Authentication in your mail client. 550-mxin3.dnetsurabaya.id [202.148.11.228]:42805 is not permitted to relay 550 through this server without authentication. (in reply to RCPT TO command) Ini sebenarnya yang salah sender atau recipient-nya ya? Sebelumnya saya ucapkan terima kasih, Rusdi -- --[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.co.id Berlangganan: Kirim mail ke mdaemon-l-subscr...@dutaint.com Henti Langgan: Kirim mail ke mdaemon-l-unsubscr...@dutaint.com Versi terakhir MD 18.5.1, SG 5.5.0