Hi We have an application running on on our web server which is in dmz. In the application it using mailing which is not working now. It is a java application which is working fine if both application and mail server I in same network( internal.) As I published my internal Mail server I specified external ip of ISA server which I used for mail publishing in the application , but still not working. What can I do to enable communication between my Web servers in DMZ with Internal mail server. Any help on this will be highly appreciated. Regards Aboo Arif