System Commander Safely and securely run multiple operating systems on one PC!
Fix-It Utilities Make your PC run like new! Includes Anti-Virus, Anti-Spyware, hardware diagnostics, registry fixer, and more!
Partition Commander Now it's easy for anyone to safely partition their hard drive! You can reclaim waste disk space, organize files, even add new OSes.
404.3
MIME Map policy prevents this request
Description
The server is configured incorrectly and doesn't support features that are used on the web page.
Example
Server Error
404.3 - File or directory not found: MIME map policy prevents this request.
The page you are requesting cannot be served due to the Multipurpose Internet Mail Extensions (MIME) map policy that is configured on the Web server. The page you requested has a file name extension that is not recognised, and is therefore not allowed.
Error messages will differ depending on the web server and if replaced by the web site designers.
Occurrences
Frequency is relative to other Internet warnings and errors.
Solutions and Fixes
This issue can only be fixed by the web site owner.
Solution 1 of 3 - Fix Server Configuration
50
The web server may be configured incorrectly. If this is the problem, the site owner/webmaster will have to fix the problem.
Undefined solution - please let the webmaster know about this issue. [later_time2
cached-13]
Solution 3 of 3 - Notify Webmaster
46
You might notify the webmaster about the issue. Include the error number and the address (URL) where the error occurred along with any other relevant details.
Many sites use an email address in the form webmaster@sitename.com where you replace sitename.com with the web sites address (don't include a www). Keep in mind with the amount of spam, they may use a different address and/or it might get ignored. Check the websites' contact information to get reliable contact information.
Official Explanation
This problem occurs if the following conditions are true: 1. The handler mapping for the requested file name extension is not configured. 2. The appropriate MIME type is not configured for the Web site or for the application.
"404.3 - MIME Map policy prevents this request" is only supported by Microsoft IIS (Internet Information Services) web servers.
MIME (Multipurpose Internet Mail Extensions) provides additional formatting features to Internet mail.
The four hundred series of errors indicate something was sent to the remote web server incorrectly.
While we believe this information up to date and accurate, FAQware is not responsible for any inaccuracies. If you find something that is out of date or inaccurate, please let us know at
so we can correct it.
