|SaaS||DCI / Gateway|
What is the issue?
Legitimate email with the MIME type is being blocked as "Banned".
What causes this issue?
The application/octet-stream is a MIME type that is generically used for attaching several types of files to messages, including:
- Executables (including viruses)
- .doc and .xls files (including those with viruses)
- .docx and .xlsx files (that are legitimate)
- .pdf files (that are legitimate)
- .ZIP and other archive
Given the generic nature of this MIME type, it should never be used either to block or allow in Content Filtering > Attachment > Mime Type Filters.
What is the solution?