OE Tweaker is a freeware utility designed to give you control over some hidden Outlook Express options and provide an easy way to access the Blocked Senders list.
Some useful Outlook Express settings are not exposed in its Options dialog and the only way to change them is to tinker with registry. That is if you don't have OE Tweaker.
Once you get this handy utility customizing the hidden Outlook Express settings becomes a snap. Another useful feature of OE Tweaker is a Blocked Senders list editor.
Filtering and columns sorting make it so much easier to find and remove an email address of an accidentally blacklisted friend when the list has few hundred entries.