http://www.postfix.org/MULTI_INSTANCE_README.html
My client has Postfix 2.3.3. Must I update to 2.6+ to run multiple instances side-by-side? Could I manually create an instance by, e.g., creating an /etc/postfix-foo with main.cf and master.cf, and configure them to use different files and directories? Updating the postfix version might be a good idea for other reasons, but it would increase the scope of the issue a bit. Thank you, Scott Stirling AT&T, Boston
