Question : Not receiving emails with Exchange 2003

Hi There

I have just set up a new ISA Server 2006 firewall, Our old firewall was ISA server 2004. Everything is working fine except that our Exchange 2003 server has stopped receiving email. I set up a Mail server Publishing rule in the new firewall pointing to the email server. It isnt working. Any ideas or things I could try. Is there something in exchange itself that needs to point to the new firewall?

Answer : Not receiving emails with Exchange 2003

do you have any antivirus/antispam on your new isa ? if yes then uninstall it and test