Hey,
i have already seen that RTF Emails are converted to a HTML Email during loading process as mentioned here:
https://forum.aspose.com/t/retain-rtf-format-with-mailmessage/23676
https://forum.aspose.com/t/aspose-em…...Detect RTF email Aspose.Email Product Family email-body msc.bs...seen that RTF emails are converted to a HTML email during loading...