I have just installed OS X 10.10 server and discovered that traditional postfix aliases no longer work 'out of the box'. I am sure that it is just a simple configuration issue, as I did get it working for a time, but then managed to break it again.
... I am confident that this will be a simple job for someone familiar with postfix and OS X.
I do not want to provide a remote login or screen sharing, so I am expecting this to be resolved by email. ... You must be very familiar with postscript, and also with OS X server 10.10, note this differs from 'standard' postfix installs. Familiarity with Apple's implementation is key to this issue, and note that this changed from 10.10 onwards so you must have up to date experience.