Pure Message Content Filtering Sender Whitelist
Either make the Allowed Sender list or create a new one to apply to Content Filtering.
I have something to add to this option. We have currently blocked all Word and Excel files with macros via the Content Filter. Nevertheless, it would be internally necessary to send your own documents with macros. It would be a feature if you could arrange a code internally before the file extension which would bypass the filter. Example _example.xls or _example.doc. At the moment I was informed by the support that the exclusion works only with file extensions like * .xls etc.