How to whitelist or blacklist an email address or domain in Office 365
Go to https://outlook.office365.com/ecp/Antispam/SpamContentFilter.slab and login with your Office 365 credentials
- Click on Pencil to edit your Spam Filter settings
- Add the domains or email addresses you want to ALLOW (whitelist) to the Allow Lists
- Add the domains or email addresses you want to BLOCK (blackliist) to the Block Lists
- Click Save when your finished and it will update your organization settings
- That’s it!