Thanks for the reply,through some research from many sites,i understand that if i configure my local server as a subdomain like myplace.mycompanyname.com,the problem will be solved.Still i have many
queries on my mind.
1.If i configure my local server as "myplace.mycompanyname.com, all the users will be email@example.com
2.Can i masquerade to "mycompanyname.com"?
3.Now my localserver is acting as relay to my isp server.Will it work after changing to subdomain?