Hi In AD account, using exchange delivery option i have forwarded the emails to a external account. Forwarding is working only for internal users. Mail forwarding is not working when mail sent by the external users(For eg: from hotmail.com or any other than organization) Please provide me a solution to make the forward option for external senders also.

Hello Nair, I hope you have created a contact for external account and selected it in exchange delivery option. Step-by-step guide for Exchange 2000/2003: http://www.msexchange.org/tutorials/MF015.html