Does anyone use Exchange 2000 or 2003 in a DMZ behind a Sonicwall Pro 300? I'm wondering, because I get the same Internal Server Error 500 on my new front end/back end e2003 boxes as I did with 2000. I am getting suspicious of the firewall with regards to http packets. I have been troubleshooting this for a long time, and it happens a lot less on my new 2003 implementation. -Jason The HealthCare Chaplaincy is a multifaith community of professionals from many cultures dedicated to caring for persons in spirit, mind, and body. We are committed to excellence and leadership in pastoral care, education, and research. Privileged/confidential information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), please notify the sender and do not copy or forward this message to any other person.