I have configured RH 9 with SM 8.12.10, latest SpamAssasin and MimeDefang. My external DNS is configured so that the "main" email server (Exchange 5.5, booooo) is the primary MX for the domain, and the SM mail filter machine is the secondary MX. I receive the Internet emails, and tagging of email (either spam or ham) works great, but the messages are not being relayed to the Exchange server as they should. I had an older version of SM and SpamAssassin working on this machine, and it did this no problem. I have attempted to configure /etc/mail/sendmail.mc and thought that I had the correct stuff turned on. I made sure that I included the Exchange server in the /etc/mail/relay-domains file, in the access.db (which I re-hashed), and in the hosts file. I also insured that the internal DNS servers were correct on the SM machine so that it could do a lookup and see that it was not the primary destination for mail for the domain and forward it over to Exchange. I am desperate to get this up, if anyone has the secret please let me know and I will be forever grateful. Thanks and cheers.