Email sent from non existing account

Question

Hello,

we got email from internal domain but the account is not exists on the exchange. Anyone know what and how this email can be sent?

Account ibm.support previously exist in our domain but about from last 2 months we delete this account and now not exist in our domain.

Answer 1

Hi @Handian Sudianto

You can check an email that has entered the user's mailbox to see if the sender address in the email header is consistent, preventing this from being a Domain Spoof. also, you can check the SPF record.

double click the message->properties->internet headers

If so: Setting Up Domain Spoof Protection in Microsoft 365

(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)

Regards

Shaofan

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