Prevent specific people from sending you unwanted emails by adding their email addresses to the Blocked Senders list in Microsoft Outlook 2013. Outlook does not notify the sender when you add his email to the list. You can use the Blocked Senders list to get rid of spammers, too. The software moves all new emails originating from that email address to the Junk E-mail folder as soon as it receives them. You can move received emails to the Junk folder yourself and block the sender in the process and you can even block entire domains.
Launch Microsoft Outlook 2013 and locate one of the emails sent by the person you wish to block. Right-click the email, select Junk and click Block Sender to block the sender immediately.
Click the OK button when Outlook confirms that the sender of the message has been added to the Blocked Senders list and that the message has been moved to the Junk folder.
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If you can't find a message from the person you wish to block, add his email address or domain to the Blocked Senders list manually. Click the Junk button in the Delete group on the Home tab and select Junk E-mail Options from the menu to display the Junk E-mail Options dialog. Select the Blocked Senders tab to manage the blocked senders manually.
Type the email address of the offender -- "SampleEmailAddress@Spammer.org" for example -- into the Enter An E-mail Address field and click the OK button to add it to the Blocked Senders list.
To block an entire domain, blocking all its email addresses at once, type @domain.com or just domain.com and click OK. For example, to block email@example.com, firstname.lastname@example.org and email@example.com, type @sampledomain.com into the field and click OK.
Remove an email address from the Blocked Senders list by selecting it and clicking the Remove button. The sender is unblocked when you click Apply.
Back up the Blocked Senders list and never give spammers a chance to return. Click Export to File and save the list as a TXT file on your hard drive. To import the entire list into another copy of Outlook, click the Import from File button.
Click Apply to apply the changes to the list and then click OK to close the Junk E-mail Options dialog. The changes are applied immediately and all email addresses are blocked; you don't need to restart Outlook.