As per my prior Mail Server Configuration, I had to set up the MarkasJunk2 for the Roundcube. Currently setup it as sa-learn to help Spamassassin to learn the junk emails. For some reasons sa-learn is not responding to requests submitted by MarkasJunk2 (I will keep posting regarding this). MarkasJunk2 working fine and provides the functionality to mark emails as spam.
PS: I was able to sort out the