Setting the request Email body mapping as Inline - prefer html will only retrieve the .pyInboundEmail.pyBody with html content. But displaying the .pyInboundEmail.pyBody directly in UI (section) with control as Text-Input or Text-Area will again turn it into text and display.
To display it as HTML content create a Paragraph rule and insert the .pyInboundEmail.pyBody property with format as : RichTextDisplay and then embed/insert this pargraph in the UI (section) where you are displaying the whole email information received.
Thanks PallaR67 for the quick reply. I have followed the solution which you have provided.But my issue was not resolved.
I have created a paragragh and referred this in a section. Later, i have referred this section in response html using the pega include tag. But when i have tested with listener, i am getting this pega include tag in response email instead of getting the content of the section.