BizTalk：使用文件适配器删除接收位置上的“垃圾邮件”消息

My customer sometimes receives "spam" messages on their BizTalk file drop locations i.e files not of the type expected by the receive location filter eg a .doc instead of a .xls. The file adaptor does not have an option to delete such "junk" - probably for good reason- , and we can not stop the sender of these files from occasionally sending them.My customer sometimes receives "spam" messages