Blocked Senders feature in Outlook 2010 does not work

Question

I have a specific blocked sender
[email protected] listed in my Blocked Senders list, but emails from that email
address still go to my Inbox instead of the Junk E-mail folder. 
We use Exchange for email, and Outlook 2010 as the client.
Note: this sender is blocked for a specific sender that he configured through Junk E-mail Options in Outlook 2010, and this sender is not blocked at the server level.
I only have one account set up in Outlook. 
What do I need to do to get Blocked Senders / Junk E-mail working in Outlook?
Thanks,
Elizabeth

Answer 1

Hi,
From your description, I suggest you try to check the total size of blocked sender list. As total size of all lists combined cannot exceed 512K. Once the 512K limit
is reached, Outlook alerts you and additional addresses aren't saved until you remove some from the list.
If your issue is caused by the limited size, you can add a new registry key value to the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\
Add a new DWORD value of Type Max Extended Rule Size and edit the Value Data, entering the maximum size (in bytes) you want to allow.
If your issue is not related to limited size, try to keep your junk e-mail filter updated. Each version of Microsoft Outlook that contains a junk e-mail filter receives updates to the data
file (outlfltr.dat) as part of the Microsoft-wide monthly update released on the second Tuesday of each month. The updated outlfltr.dat is the result of the evaluation of hundreds of thousands of spam messages and constantly increases the filter “catch”
rate for incoming junk email.
The recommended way to obtain updates to the Outlook Junk E-mail filter is by turning on the Automatic Updates option in the Windows Security Center.
If you have done all above but it still not work, try to create a new outlook profile to test this issue.
 Go to Start > Control Panel, click Mail. The title bar of the Mail Setup dialog box contains the name of the current profile. To select a different
existing profile, click Show Profiles, select the profile name, and then click Properties.
 Click Show Profiles. Choose Prompt for a profile to be used.
 Click Add.
 Type a name for the profile, and then click OK.
 Start Outlook, and choose this new profile.
Sincerely,
Harry