This article describes how to access and manage your blocked and safe senders lists within the Microsoft 365 Outlook Webapp

See also Managing Blocked/Safe Senders in Outlook if you are using the Outlook Desktop App.

Sign into  using your SU credentials

Select Outlook from the list of available applications

On the right hand side select the gear icon to access settings then choose View all Outlook settings

In the settings window under Mail select Junk email.

Click Add below Blocked senders to add users to the blocked list or under Safe senders to add to the safe recipient list.

To remove an email address highlight the email to be deleted and select the trash icon to the right

When you are done making changes select Save 

You are evaluating Refined.