Since migrating Faculty and Staff email to Exchange Online Protection, there has been an increasing concern over email falsely identified as Junk. Microsoft’s protection filters are quite stringent in their handling of email mailing lists, and many have reported issues with this type of email. To ensure you receive messages to your Inbox from mailing lists you have subscribed to, ensure you add these senders to your Safe Senders list.  

Email addresses and domain names in the Safe Senders List are never treated as junk email, regardless of the content of the message. You can add your Contacts and other correspondents to the Safe Senders list to confirm you’ll always receive their email messages in your Inbox. 

Additionally, Outlook has a blocked senders list you can manage for your mailbox. Email addresses and domain names in the Blocked Senders List are treated as junk email and will be delivered to your Junk email folder within Outlook. The messages within your Junk email folder are deleted after 30 days.  

See the following help article about managing your Safe and Blocked senders. 

Add safe senders and blocked Senders in Outlook – Tech Support Knowledge Base – MacEwan Help Centre