I have an Exchange 2000 and ISA network, no filtering done at the ISA box it is set to allow all trafic through, when I try to send an message out of the organization i get an NDR with error 5.7.1 from a 2K box running outlook 2k, stating I do not have permissions to send to that recipent, not even an admin acct can send mail out. any ideas what permission is causing the problem
