If you receive a large amount of spam email from a specific sender, you can block that sender within Outlook. Blocking a sender causes all email from that sender to automatically move into the Junk Mail folder. To block a sender, simply follow these steps:
- Right click on the spam message in your list emails.
- Near the bottom of the pop-up menu, you should see Junk.
- Hovering over that with your mouse brings up multiple options.
- Click on Block Sender.
If a message is sent to your Junk E-Mail folder by mistake, you can follow the same steps and choose to never block the sender.
The bottom option on the pop-up list is for advanced options. From there you can change options about links, suspicious domain names, and permanently deleting junk mail (not recommended), as well as deciding how strict filtering should be. The other tabs at the top allow you to edit your safe and blocked senders lists. You can add individual email addresses (firstname.lastname@example.org) or domain names (@whatever.com). Adding domain names will allow/block all email addresses from that domain, no matter who sent it.
For more information please visit: http://office.microsoft.com/en-us/outlook-help/overview-of-the-junk-e-mail-filter-HP010355048.aspx