After I've add a new spammer to my blocked Senders list, I check the next
time to see if the list is accumulating, only to find that it isn't.
I've tried the following suggestion posted earlier ...

"That usually means the registry section for Blocked Senders is corrupted.
You may need to delete the existing key from the registry and then rebuild
your list.  The location to look is here:

To delete the key from the registry, close OE and click Start|Run and type
regedit. In Regedit, navigate to this key:
HKEY_CURRENT_USER\Identities\{GUID}\Software\Microsoft\Outlook
Express\5.0\Block Senders

where {GUID} is the Global Unique IDentifier for your Identity. Under the
Block Senders key, you will see a key for Mail and another for News. Delete
the one that is not working, or delete the entire Block Senders key if the
problem occurs in both mail and news. OE will create a new key when you
reopen it.
--
Jim Pickering, MVP, Outlook Express
https://mvp.support.microsoft.com/profile=F9F51EF1-4AE3-4D23-B2D8-1171988A62
D6
Please deliver feedback to the newsgroup, so that others can be helped.
Thanks."

for another users similar problem, but found it hasn't worked.

Any suggestions ?

Thanks in advance, Brad