Problem
You have setup your Rails app to send out emails using postfix, but you also want to redirect the incoming emais to a different account.
Solution
Edit the postfix configuration file vi /etc/postfix/main.cf and add the following two lines at the bottom:
virtual_alias_domains = outgoing_domain.com virtual_alias_maps = hash:/etc/postfix/virtual
And then add the redirections to the virtual file with vi /etc/postfix/virtual:
outgoing_email@outgoing_domain.com other_account@other_domain.com @outgoing_domain.com other_account@other_domain.com
Then run the following two commands to restart postfix:
postmap /etc/postfix/virtual postfix reload
* Based on the post here