About 'application/octet-stream' MIME attachments A MIME attachment with the content type 'application/octet-stream' is a binary file. Typically, it will be an application or a document that must be opened in an application, such as a spreadsheet or word processor. If the attachment has a filename extension associated with it, you may be able to tell what kind of file it is. A.exe extension, for example, indicates it is a Windows or DOS program (executable), while a file ending in.doc is probably meant to be opened in Microsoft Word.
Apr 25, 2018 - Under: Content Type Breakdown is are: empty - I think this is like. As far as i know application/octet-stream is sent with the header and is also.
No matter what kind of file it is, an application/octet-stream attachment is rarely viewable in an email or web client. If you are using a workstation-based client, such as Thunderbird or Outlook, the application should be able to extract and download the attachment automatically. After downloading an attachment through any of these methods, you must then open the attachment in the appropriate application to view its contents. Before opening attachments, even from trusted senders, you should follow the guidelines listed in.