Quarantining messages with specific file types

You can quarantine messages containing attachments matching file types that you specify.

File types are grouped together into file formats. For example, if you select the Sound format, this quarantines anything related to sound files, including RealAudio, Windows Media Audio, MPEG Audio, and MIDI files.

You can expand a file format to select or remove specific file types from the quarantine list. For example, you can select the Standard Graphics format to block all standard image attachments, but then choose to clear the JPEG file type within that format to allow JPEGs to be delivered.

If the available file types do not meet your requirements, you can set up custom file types containing one or more file extensions and MIME types. For more information, see Creating custom file types. The custom file types you create are available for all policies, and appear as part of a default custom file format on the same page as the supplied file formats.