From theHomeribbon menu, choose theJunkoption in the Deletegroup and thenJunk E-Mail Options.

Enter the domain name to block.

you’re able to key in it with the @ like@spam.netor without it, such asspam.net.

Junk button on Outlook Home tab

Do not enter multiple domains in the same text box.

To add more than one, save the one you just entered and then use theAddbutton again.

SelectOKto add the domain and selectOKagain to kill the dialog.

Blocked Senders tab of Outlook Junk Mail Options dialog

Add button on Blocked Senders tab of Outlook Junk Email Options

Add address or domain box in Outlook Junk Mail Settings dialog