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Microsoft's IIS 7.0, IIS 7.5, and IIS 8.0 servers define the following HTTP substatus codes to indicate a more specific cause of a 404 error: 404.0 – Not found. 404.1 – Site Not Found. 404.2 – ISAPI or CGI restriction. 404.3 – MIME type restriction. 404.4 – No handler configured. 404.5 – Denied by request filtering configuration.
Clients such as search engines should remove the resource from their indices. Most use cases do not require clients and search engines to purge the resource, and a "404 Not Found" may be used instead. 411 Length Required The request did not specify the length of its content, which is required by the requested resource. 412 Precondition Failed
404 Not Found The server has definitive information that the user does not exist at the domain specified in the Request-URI. This status is also returned if the domain in the Request-URI does not match any of the domains handled by the recipient of the request. [1]: §21.4.5 405 Method Not Allowed
If you're using an older or outdated browser, such as Internet Explorer, you may need to access AOL Mail from a different browser. If you don't have an updated or supported browser installed on your computer, you'll need to update your existing browser or download a new one. Check your display name:
Download all attachments in a single zip file, or download individual attachments. While this is often a seamless process, you should also be aware of how to troubleshoot common errors. Emails with attachments can be identified with Attachment icon in the message preview from the inbox.
If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem.
Alternatively, the file might not exist, or the user has mistyped its name. This is most commonly seen on the internet with outdated links to web pages that no longer exist. On a local computer, this is more frequent on command line interfaces than on graphical user interfaces where files are presented iconically and users do not type file names.
The server returns a 412 (Precondition Failed) response when the precondition supplied by the client using the If-Match or If-Unmodified-Since header fails. If no precondition is supplied and there is a conflicting modification then the server returns a 409 (Conflict) response.