The new Outlook does not support blocking senders for third-party accounts like Gmail, Yahoo, iCloud, and other domain-based email services. Users must configure blocking settings through their …

Add email addresses and domain names that you trust to the Safe Senders List. On the Home tab, in the Delete group, click Junk, and then click Junk E-mail Options.

Stop receiving email from someone by adding his or her email address to your blocked senders list. You can also unblock an email address from your blocked senders list.

You can unblock downloads of linked pictures and other external content for a single message that comes from a trusted source. Choose the InfoBar at the top of the message, and then select …

It's a good idea to periodically review email messages identified as junk to make sure you're not missing important messages. If you later decide you want to unblock a sender, use Junk Email Filters to …

Safe senders are people and domains you always want to receive email messages from. Safe recipients are recipients that you don't want to block, usually groups that you’re a member of.

In Teams, you can block or unblock anyone outside your org who uses Teams, Teams for personal use, Skype (for consumers), or Skype for Business. When you block someone, they can't communicate …

Clicking on the unscreened emails at the top of your Inbox will bring you into the Sender Screener. From here, you can triage each new sender you receive emails from as "allowed" or "blocked".

Learn how to block someone or add email addresses to the safe senders list in Outlook on the web.

To block a sender in an existing conversation, go to the chat in the chat list, and select More options > Block. To unblock a person, go to the chat in the chat list, and select More options > Unblock.