Postfix aliases
 

I'm trying to add aliases to a postfix server that runs multiple domains and I need to add the same aliases for multiple domains.

ie:
webmaster@domain.com: user1
webmaster@otherdomain.com: user2

It seems that the format above is incorrect, and I get the message:
postalias: warning: /etc/aliases, line 8: name must be local

How can I add those aliases?

TIA,
Pat

Edit /etc/postfix/recipients (or recipients-canonical, whatever it's called) to identify local recipients.

Example:
webmaster@domain.com user1
webmaster@otherdomain.com user2

Then edit /etc/postfix/main.cf. Look for the line which reads:

local_recipient_maps = hash:/etc/postfix/recipients. If it does not exist, add it.
When done, execute the command 'postfix reload' to pick up the config changes.

Source of info: Postfix FAQ