Stopping Spam from Own Email Domain

Written by Allen White on. Posted in Exchange 2013, Exchange 2016

We have all seen it where it appears that either yourself or someone internally (user@mydomain.com) within your exchange organisation appears to be spamming users in the internal address book.

This can be annoying as you cannot block these users you just need to find a way of stopping them being “spoofed”, this is how to stop from from your own domain in Exchange 2013 and Exchange 2016.
First we set a filter for your domain name with the following command in Exchange Power shell.

Set-SenderFilterConfig -BlockedDomains mydomain.com

We then make sure that we accept email still for the domain internally with the following.

Set-SenderFilterConfig -InternalMailEnabled $true

The make sure you restart the Exchange Transport Service.

With the above we are removing the capability to receive email from your own domain externally but still allowing internally. The only issue this may cause is if you have SPF records that allow external resources to send email or relay internally on your behalf.

For a more in depth look into Exchange 2013 and Exchange 2016 Spam configuration then look at this article.

 
Allen White
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Allen is a Consultant for ITPS in the North East of England and holds the following accreditations. MCSA, MCSE, MCTS, MCITP, CCA, CCSP, VCP 4,5 and HP ASE, AIS - Network Infrastructure.

ITPS provides strategic IT consultancy, implementation, data centre provision and unified communications, as well as support services and workspace and disaster recovery. If you require a consultation then please contact me via the contacts section or direct on 07931222991, add me on linkedin. https://uk.linkedin.com/in/allenwhiteconsultant0001

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