Per chance would the email address youa re using in Outlook Express be a Hotmail address?
If so, then the best thing you can do is go on-line to your Hotmail account to the Options section and activate your Junk Mail option to the 'highest' filter level. That would ensure that any mail that is not specifically addressed to you will be sent to the Bulk Mail folder.
For the next few days, check your email on-line (rather than using Outlook) and where an email from someone you know has ended up in the Bulk Mail folder, you can click on it and add follow the options to add the address to your Safe List.
That should help stem the flow into your Inbox.
However if your address is not Hotmail, then check if your provider has similar options that you can use. For example Yahoo, will automatically filter email to a Bulk folder if it is not addresses personally to you.
Hope this helps you out.