Thank you for writing to us.
I have tested this issue at my end using the latest version of Aspose.Email for .NET 2.8.0 and would like to share with you that this is not an issue at Aspose.Email end. Aspose.Email converts the MSG to intermediate MHTML format, which is saved correctly.
Please have a look at the attached MHTML file which is created using the following code:
MailMessage mailMsg = MailMessage.Load(“About
You may contact the Aspose.Words support team for further assistance in this regard. If you have any other query/inquiry related to Aspose.Email, please feel free to contact us. We'll be glad to assist you further.