Our product eTray is currently using Aspose.Email.dll version 4.3 with great success. However, upgrading to a newer version was a disaster. Mail content was totally destroyed in the sense that the MSG file could not be opened with Outlook. The content was just gone. For some mail the first line was visible and the rest of then mail just disappeared.
The code can be boiled down to this:
MailMessage mailMessage = new MailMessage();
mailMessage.HtmlBody = "