Send message in HTML format from Service Desk

Dear All,

I have configure Service Desk in Solution Manager 7 EHP1 (ABAP+JAVA Stack).

I am able to send the message to end user in case of change status from "New" to "In process" in PDF or TEXT format.

I want to send same in HTML with link just like SAP Support message we are getting in our inbox.

How to do that?

Thanks in advance,

Nirav