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There is no viewer component of Aspose.Email API that can be used to display EML file. However, you can use MailMessage class to load and convert EML files to HTML/MHTML that can further be displayed in a browser. Please have a look at the following sample code and our documentation article
for further examples in this regard and let us know if we can be of any additional help to you in this regard.
MailMessage message = MailMessage.Load(“sample.eml”);