troubleshooting Question

Exchange 2016 BackScatter configuration

Avatar of Jean-François Guénet
Jean-François GuénetFlag for Canada asked on
6 Comments1 Solution1041 ViewsLast Modified:
Hello im trying to configure my exchange 2016 server so it dont get BACKSCATTER

Ive done this on my server

Set-Remotedomain default -NDREnabled $true
Set-RecipientFilterConfig -RecipientValidationEnabled $true

and restart Transport Service

Now when im sending an email from gmail to an invalid email address test@xxx.xx ive got a reply from

Mail Delivery System <MAILER-DAEMON@xxx.xx>
10:01 AM (5 minutes ago)
 to me

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

<test@xxx.xx>: host 192.168.xx.xx[192.168.xx.xx] said: 550 5.1.10
    RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup
    (in reply to end of DATA command)

Is this a normal behavior ?

Should i not receive an email from GMAIl instead to notify me that the adress test@xxx.xx don't exist

Thanks for helping me
timgreen7077Exchange Engineer
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