http://office.microsoft.com/pt-br/outlook-help/limpar-itens-imap-marcados-para-exclusao-HP010080420.aspx
http://email.about.com/od/outlooktips/qt/Hide_Strikethrough_Messages_Marked_for_Deletion_in_Outlook.htm
https://suporte.icewarp.com.br/index.php?/Knowledgebase/Article/View/377/26/como-faco-para-o-outlook-nao-riscar-mensagens-de-uma-conta-imap-marcar-para-exclusao