these fixed a clients problem with mail sitting in the outbox...might help http://search.support.microsoft.com/search/default.aspx?Catalog=LCID%3D1033%26CDID%3DEN-US-KB%26PRODLISTSRC%3DON&withinResults=&QuerySource=gsfxAdvancedSearch_Query&Product=out2K&Queryc=email+stuck+in+the+outbox&Query=email+stuck+in+the+outbox&KeywordType=ALL&maxResults=25&Titles=false&numDays=