Scan to email document received in ".eml" instead of ".pdf"

Screenshot of the email when rule wrap is applied:

Screenshot of the email when rule ignored is applied:

We hope to incooperate the disclaimer message with the new C brand printer, 

is there a workaround for this issue?

Source: 

https://social.technet.microsoft.com/Forums/exchange/en-US/98180ffb-8734-4f12-a8da-779fda4e9211/scan-to-email-document-received-in-eml-instead-of-pdf?forum=exchange2010