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Do I need to do anything else for AP Extended MIME Types to work?

Nope, just upload and activate. There are not options, so the code'll do the rest.

How do I add a new MIME type?

Edit mime-types.txt to add/remove MIME types. Add your new MIME type in this format: extension content/type. For example:

• pdf application/pdf
• mid,midi audio/midi

For more file and formatting examples, view the mime-types.txt file. Also, a full list of MIME types is kept up on the IANA website.

What in the world is a MIME?

No, MIMEs are not white-faced, beret-sporting people who live in a "box". MIMEs are Multipurpose Internet Mail Extensions.