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Creative Commons Attribution 4.0 International License
© Rakhesh Sasidharan


Modifying Junk Email configuration using PowerShell

You can use the (Set|Get)-MailboxJunkEmailConfiguration cmdlets to set or view the Junk Email configuration of a mailbox. For instance:

From the Get-MailboxJunkEmailConfiguration output above I can see Junk Email configuration is Enabled for this mailbox, all email addresses in the Contacts folder of this mailbox are automatically added to the trusted senders list, any emails from the domain are considered trusted senders and delivered to the mailbox, and no domain is considered blocked and hence not delivered to mailbox. Further, the mailbox is not solely relying on these trusted lists – if it were, then only addresses in the trusted list would be allowed through and everything else discarded.

To change these values use the Set-MailboxJunkEmailConfiguration cmdlet. Its syntax is pretty straightforward.

To add entries to the trusted or blocked senders lists one must retrieve the entries first and then append to it. So either do it the longish way like this:

Or do it all in one go like this:

In either case the result is the same:

Of course, goes without saying, the beauty of being able to do something like this via PowerShell rather than manually on Outlook or Outlook Web App is that you can do bulk action. Like for instance:

Easy to see at one shot what the status for each user is.

I can get rid of the OU name in the Identity column via some format-table regexpery.

A variation of the above:

Here I am using regexp to strip out the “” bit so I only get the user identity and the OU it is in. I do this by making the + regexp operator non greedy so it doesn’t match all the input text – rather, it stops at the first “/” character. I then put this regexp in brackets to club it together and tell PowerShell to match exactly two instances of this (hence the {2}) so what remains is the bit which I want. Regexps are great when they work and you can make sense of them!

Modifying Junk Email configuration using PowerShell by rakhesh is licensed under a Creative Commons Attribution 4.0 International License.