http://www.msexchange.org -------------------------------------------------------I have an IIS SMTP server setup on a machine as a listserv that can email my exchange server perfectly. However, I am unable from exchange send any email back to the IIS SMTP Listserv. I know the ListServ can receive mail. The issue, I am pretty sure, is that they are both behind a firewall with NAT. I believe the exchange server is resolving the ip address for the listserv as the external ip instead of the internal ip. Is there a way within exchange 2k that you can tell it ... All mail destined for domain @list.blah.com forward to internal ip 10.10.10.10? Confidentiality Notice Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this e-mail by anyone else is unauthorized. If you are not an addressee, any disclosure or copying of the contents of this e-mail or any action taken (or not taken) in reliance on it is unauthorized and may be unlawful. If you are not an addressee, please inform the sender immediately and delete this message from your system. ------------------------------------------------------- List Archives: //www.freelists.org/archives/exchangelist/ MSExchange Newsletter: http://www.msexchange.org/pages/newsletter.asp MSExchange Articles and Tutorials: http://www.msexchange.org/articles_tutorials/ MSExchange Blogs: http://blogs.msexchange.org/ ------------------------------------------------------- Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------- To unsubscribe visit http://www.msexchange.org/pages/exchangelist.asp Report abuse to listadmin@xxxxxxxxxxxxxx