After creating the missing config file via "sudo cp /usr/share/postfix/main.cf.debian /etc/postfix/main.cf", now this error is logged in mail.err log:
"postfix/local[17422]: fatal: open database /etc/aliases.db: No such file or directory"
So I ran: "sudo newaliases" then "sudo /etc/init.d/postfix restart", and problem solved.
Then to verify run "sudo /etc/init.d/postfix status" and you should get "postfix is running" and check mail.err via "sudo nano /var/log/mail.err" to make sure no more errors are being logged.
Ubuntu 10.10 Server still has this problem.
After creating the missing config file via "sudo cp /usr/share/ postfix/ main.cf. debian /etc/postfix/ main.cf" , now this error is logged in mail.err log:
"postfix/ local[17422] : fatal: open database /etc/aliases.db: No such file or directory"
So I ran: "sudo newaliases" then "sudo /etc/init.d/postfix restart", and problem solved.
Then to verify run "sudo /etc/init.d/postfix status" and you should get "postfix is running" and check mail.err via "sudo nano /var/log/mail.err" to make sure no more errors are being logged.
Can't believe this still is not fixed.