MIME types describe the media type of content, either in email, or served by web servers or web applications. They are intended to help provide a hint as to how the content should be processed and displayed. Examples of MIME types: text/html for HTML documents.; text/plain for plain text.; text/css for Cascading Style Sheets.; text/javascript for JavaScript files. Migration from GroupWise 7.0.4, 8.0.3, 12.0.2 or 2014 to Exchange 2010, 2013, 2016 or Office 365. Impact: Exchange 2010 or 2013 as a target: a recurrent Note item generates a recurrent meeting in the target for every Note occurrence in the source. Exchange 2016 or Office 365 as a target: a recurrent Note item is migrated as a number of separate. This has to be the laziest way I’ve ever seen anyone display data in a list. Just a block of garbage. Microsoft Outlook 2007 SP3, Microsoft Outlook 2010 SP2, Microsoft Outlook 2013 SP1 and RT SP1, Microsoft Outlook 2016, and Microsoft Office 2016 Click-to-Run (C2R) allow a remote code execution vulnerability, due to how Outlook handles objects in memory, aka 'Microsoft Office Memory Corruption Vulnerability'. This CVE is unique from CVE-2018-0851. In the Outlook 2016 forum, but was instructed that it should be asked here in the Exchange forum instead.) My organization runs Outlook 2016 via Office 365, using.
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Certificate Is Not Trusted in Web Browser
The following warnings are presented by web browsers when you access a site that has a security certificate installed (for SSL/TLS data encryption) that cannot be verified by the browser.
Internet Explorer: 'The security certificate presented by this website was not issued by a trusted certificate authority.'
ErrorCode (SOAP)
Firefox 3: 'www.example.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.' or 'www.example.com uses an invalid security certificate. The certificate is not trusted because it is self signed.'
Browsers are made with a built-in list of trusted certificate providers (like DigiCert). For some sites, the certificate provider is not on that list. If this is the case, the browser will warn you that the Certificate Authority (CA) who issued the certificate is not trusted. This issue can also occur if the site has a self-signed certificate. While this warning is fairly generic for Internet Explorer, Firefox 3 will distinguish between a certificate issued by the server itself (a self-signed certificate) and another type of untrusted certificate.
If you have a DigiCert certificate and you receive this error, troubleshoot the problem using the sections below. You do not need to install anything on client devices/applications for a DigiCert SSL Certificate to work properly. The first step is to use our SSL Certificate tester to find the cause of error.
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One possible cause of this error is that a self-signed certificate is installed on the server. Self-signed certificates aren't trusted by browsers because they are generated by your server, not by a CA. You can tell if a certificate is self-signed if a CA is not listed in the issuer field in our SSL Certificate tester.
If you find a self-signed certificate on your server after installing a DigiCert certificate, we recommend that you check the installation instructions and make sure that you have completed all of the steps.
If you completed all of the installation steps but are still having an issue, you should generate a new CSR from your server (see the CSR creation instructions) and then reissue the certificate in your DigiCert account by logging in, clicking the order number, and then clicking the reissue link.
Intermediate Certificate Issues
The most common cause of a 'certificate not trusted' error is that the certificate installation was not properly completed on the server (or servers) hosting the site. Use our SSL Certificate tester to check for this issue. In the tester, an incomplete installation shows one certificate file and a broken red chain.
To resolve this problem, install the intermediate certificate (or chain certificate) file to the server that hosts your website. To do that, log into your DigiCert Management Console, click the order number, and then select the certificate download link. This file should be named DigiCertCA.crt. Then follow your server-specific installation instructions to install the intermediate certificate file.
Once you import the intermediate certificate, check the installation again using the SSL Certificate tester. In the tester, an incomplete installation shows multiple certificate files connected by an unbroken blue chain.
Intermediate Certificate Issues (Advanced)
If you receive an error using our SSL Certificate tester, you are using a Windows server, and your certificate's issuer is listed as 'DigiCert High Assurance EV CA-3', please see this article for instructions on troubleshooting a SSL installation error.
Below are a few more warning messages for different browsers.
Internet Explorer 6: 'Information you exchange with this site cannot be viewed or changed by others. However, there is a problem with the site's security certificate. The security certificate was issued by a company you have not chosen to trust. View the certificate to determine whether you want to trust the certifying authority. Do you want to proceed?'
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Internet Explorer 7: 'The security certificate presented by this website was not issued by a trusted certificate authority. Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.'
Firefox 3: 'www.example.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.' or 'www.example.com uses an invalid security certificate. The certificate is not trusted because it is self signed.'
MIME types describe the media type of content, either in email, or served by web servers or web applications. They are intended to help provide a hint as to how the content should be processed and displayed.
Examples of MIME types:
text/html
for HTML documents.text/plain
for plain text.text/css
for Cascading Style Sheets.text/javascript
for JavaScript files.text/markdown
for Markdown files.application/octet-stream
for binary files where user action is expected.
Server default configurations vary wildly and set different default MIME-type values for files with no defined content type.
Versions of the Apache Web Server before before 2.2.7 were configured to report a MIME type of
text/plain
or application/octet-stream
for unknown content types. Modern versions of Apache report none
for files with unknown content types.Nginx will report
text/plain
if you don't define a default content type.As new content types are invented or added to web servers, web administrators may fail to add the new MIME types to their web server's configuration. This is a major source of problems for users of browsers that respect the MIME types reported by web servers and applications.
Why are correct MIME types important?
If a web server or application reports an incorrect MIME type for content (including a 'default type' for unknown content), a web browser has no way of knowing the author's intentions. This may cause unexpected behavior.
Some web browsers, such as Internet Explorer, try to guess the correct MIME type. This allows misconfigured web servers and applications to continue working for those browsers (but not other browsers that correctly implement the standard). Apart from violating the HTTP spec, this is a bad idea for a couple of other significant reasons:
- Loss of control
- If the browser ignores the reported MIME type, web administrators and authors no longer have control over how their content is to be processed.
- For example, a web site oriented for web developers might wish to send certain example HTML documents as either
text/html
ortext/plain
in order to have the documents either processed and displayed as HTML or as source code. If the browser guesses the MIME type, this option is no longer available to the author. - Security
- Some content types, such as executable programs, are inherently unsafe. For this reason, these MIME types are usually restricted in terms of what actions a web browser will take when given that type of content. An executable program should not be executed on the user's computer and should at least cause a dialog to appear asking the user if they wish to download the file.
- MIME type guessing has led to security exploits in Internet Explorer that were based upon a malicious author incorrectly reporting a MIME type of a dangerous file as a safe type. This bypassed the normal download dialog, resulting in Internet Explorer guessing that the content was an executable program and then running it on the user's computer.
JavaScript legacy MIME types
When looking for information about JavaScript MIME types, you may see several MIME types that reference JavaScript. Some of these MIME types include:
application/javascript
application/ecmascript
application/x-ecmascript
application/x-javascript
text/ecmascript
text/javascript1.0
text/javascript1.1
text/javascript1.2
text/javascript1.3
text/javascript1.4
text/javascript1.5
text/x-ecmascript
text/x-javascript
While browsers may support any, some, or all of these alternative MIME types, you should only use
text/javascript
to indicate the MIME type of JavaScript files.Note: See MIME types (IANA media types) for more information.
How to determine the MIME type to set
There are several ways to determine the correct MIME type value to be used to serve your content.
- If your content was created using commerical software, read the vendor's documentation to see what MIME types should be reported for the application.
- Look in IANA's MIME Media Types registry, which contains information on all registered MIME types.
- Search for the file extension in FILExt or the File extensions reference to see what MIME types are associated with that extension. Pay close attention as the application may have multiple MIME types that differ by only one letter.
How to check the MIME type of received content
- In Firefox
- Load the file and go to Tools > Page Info to get the content type for the page you accessed.
- You can also go to Tools > Web Developer > Network and reload the page. The request tab gives you a list of all the resources the page loaded. Clicking on any resource will list all the information available, including the page's
Content-Type
header.
- In Chrome
- Load the file and go to View > Developer > Developer Tools and choose the Network tab. Reload the page and select the resource you want to inspect. Under headers look for
Content-Type
and it will report the content type of the resource.
- Load the file and go to View > Developer > Developer Tools and choose the Network tab. Reload the page and select the resource you want to inspect. Under headers look for
- Look for a
<meta>
element in the page source that gives the MIME type, for example<meta http-equiv='Content-Type'>
.- According to the standards, the
<meta>
element that specifies the MIME type should be ignored if there's a Content-Type header available.
- According to the standards, the
IANA keeps a list of registered MIME Media Types. The HTTP specification defines a superset of MIME types, which is used to describe the media types used on the web.
How to set up your server to send the correct MIME types
The goal is to configure your server to send the correct
Content-Type
header for each document.Outlook For Mac 2016 Error Code: -19874 Solutions | Experts ...
- If you're using the Apache web server, check the Media Types and Character Encodings section of Apache Configuration: .htaccess for examples of different document types and their corresponding MIME types.
- If you're using NGINX, look at the NGINX configuration snippets. NGINX does not have a
.htaccess
equivalent tool, so all changes will go into the main configuration file. - If you're using a server-side script or framework to generate content, the way to indicate the content type will depend on the tool you're using. Check the framework or library's documentation.