Access to attachments via Microsoft Internet Explorer

You use Microsoft Internet Explorer and want to display attachments in the browser. To do this, Microsoft Internet Explorer checks the content of the attachment to determine the file type and display the attachment correctly (MIME Type Sniffing). In the worst case, it is thus possible that damaging files of an undesired file type are displayed in the browser or cause damage in another way. To avoid this potential threat to security, deselect MIME Type Sniffing in the security settings of Microsoft Internet Explorer.