Hi friends The problem is fixed! My /etc/postfix/transport was having a problem. There was already a man page by name transport. So I had created transport.cf instead of transport.
postmap /etc/postfix/transport.cf gave transport.cf.db and not transport.db. i removed man transport man page and dir postmap on /etc/postfix/transport. Now I can send and receive mails. thanks & regards Nataraj
