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

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