MIMEtype is a set of query that let the server knows how to deal with different file type.

To add a new MIME type in Parallels Plesk Panel, Follow steps below:

1. Login to your Plesk Panel, click on “Virtual Directories”
2. Click on “MIME Types”
3. Click on “Add MIME Type”
4. Insert the MIME type extension, and select the content from the drop down list, Click OK to save after you have done adding.
5. In case you need a custom content to handle the file, simply add in the custom content in this box, and click save

Example, to add in a .swf MIME:

AddType application/x-shockwave-flash swf



Append below with the list of MIME type list for reference:

http://www.webmaster-toolkit.com/mime-types.shtml