Bounce E-Mails for Disabled Accounts

create share 646 Reputation points
2020-09-03T04:04:27.207+00:00

Hi,

What is the proper way to bounce e-mails coming from outside to the deleted and disabled accounts in Exchange 2013? Can we do it for multiple accounts at once?

Thanks.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Andy David - MVP 142.2K Reputation points MVP
    2020-09-03T11:03:29.84+00:00

    Well, there is no "proper" way. :)
    If the accounts however are deleted and the email addresses are gone, they will bounce back with a NDR, that is really the best way if you want senders to get a bounce.

    If you want to keep the SMTP addresses and only bounce external messages sent to them, then one easy option is to add those disabled mailboxes to a distribution group, then create a mail flow rule that rejects messages sent to to members of that group.

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  1. Lucas Liu-MSFT 6,161 Reputation points
    2020-09-04T03:13:34.463+00:00

    Hi @create share ,
    Based on my knowledge, if we deleted or disabled the mailboxes in Exchange 2013, all Exchange attributes are removed from the associated user account in Active Directory. So senders will receive the DNR when they send an email to these deleted or disabled account.
    In the screenshot below, I first disabled user2's mailbox, then tried to send an email to user2 and received the NDR.
    22671-11111.png

    If you want to let other users know that these mailboxes have been disabled or deleted and don’t send email to these mailboxes, you could create a distribution group and transport rule as Andy said. After the external senders sends an email to the distribution group member, they will receive a DNR with a clear explanation
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  2. emailauth 1 Reputation point
    2021-11-22T07:00:15.997+00:00

    there are 2 options for getting bounce back emails for undelivered mail sent from to Contacts, Leads, and so on, delivered to your email address

    1. Use bounce management with the "Return bounced emails to sender' check box checked.

    OR

    1. Ensure the "Email Security Compliance" options are turned off.

    EmailAuth is the best email authentication solution in cyber security you can implement overnight!

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