I am not sure if the person who asked how to filter mail in Outlook Express got his answer. It goes like this: Tools Msg Rules Mail Complete sections 1 and 2 section 3, click on the blue words and fill in the appropriate information section 4, name the rule. But, it does not look as though you can sort by header information. (Remember MS assumes people are either too lazy or too stupid to know what that information is for anyway.)