Hello how to create E-mail Address in exchange like this (waqas.hayder@email domain.com)by using exchange policy.

http://support.microsoft.com/kb/822447 How to Modify an SMTP E-Mail Address by Using Recipient Policies

http://www.petri.co.il/configure-exchange-2007-recieve-email-other-domains.htm Configure Exchange 2007 to Receive E-Mail for other Domains Configure Specific E-Mail Addresses for Specific Exchange 2000/2003 Users Configuring Exchange 2007 to Send E-mail to External domains Configure Specific E-Mail Addresses for Specific Exchange 2007 Recipients Anil