Microsoft Office 2007 file type, Mime types and identifying characters

Where can I find a list of all of the MIME types and the identifying characters for Microsoft Office 2007 files?

I have an upload form that is restricting uploads based on the extensions and identifying characters, but I cannot seem to find the Office 2007 MIME types.

Can anyone help?

Office 2007 MIME Types for IIS

• .docm, application/vnd.ms-word.document.macroEnabled.12
• .docx, application/vnd.openxmlformats-officedocument.wordprocessingml.document
• .dotm, application/vnd.ms-word.template.macroEnabled.12
• .dotx, application/vnd.openxmlformats-officedocument.wordprocessingml.template
• .potm, application/vnd.ms-powerpoint.template.macroEnabled.12
• .potx, application/vnd.openxmlformats-officedocument.presentationml.template
• .ppam, application/vnd.ms-powerpoint.addin.macroEnabled.12
• .ppsm, application/vnd.ms-powerpoint.slideshow.macroEnabled.12
• .ppsx, application/vnd.openxmlformats-officedocument.presentationml.slideshow
• .pptm, application/vnd.ms-powerpoint.presentation.macroEnabled.12
• .pptx, application/vnd.openxmlformats-officedocument.presentationml.presentation
• .xlam, application/vnd.ms-excel.addin.macroEnabled.12
• .xlsb, application/vnd.ms-excel.sheet.binary.macroEnabled.12
• .xlsm, application/vnd.ms-excel.sheet.macroEnabled.12
• .xlsx, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
• .xltm, application/vnd.ms-excel.template.macroEnabled.12
• .xltx, application/vnd.openxmlformats-officedocument.spreadsheetml.template