Prevent Outlook from blocking content in your emails and displaying a Safe Senders warning
Add SiberMate domains to your Safe Senders list to ensure your platform emails show in full and without warnings
Please note, this solution was provided to us by a third party and we do not actively maintain the script therein. Using the commands present may require additional steps which are not documented in this article.
Emails from domains that are not on the Outlook Safe Senders list may have a warning displayed on them, as well as some of the email content including images blocked.
To prevent the 'Some content in this message has been blocked because the sender isn't in your Safe senders list' message from showing up, you will need to add SiberMate domains or custom sender domains you wish to use to the Outlook Safe Sender lists of each of your end users.
How to add Domains to your Outlook Safe Sender lists
You will need to run a PowerShell script to add the domains to the Outlook Safe Sender lists of your end users.
Important note: You will need to run this script every time you add new users - or each time before you run a simulated phishing campaign - to ensure all users have the domains added to their Safe Senders list.
Here's what the script looks like. You will need to do this for each domain.
$All = Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited; $All | foreach {Set-MailboxJunkEmailConfiguration $_.Name -TrustedSendersAndDomains @{Add="user-training.com"}}
- Run each script in PowerShell
- Check that the domains have been added to users' mailboxes