There is 3 main files that need to be modifiy:
*
/etc/mailname : the visible mail name of the system
*
/etc/aliases : Postfix local alias database format
*
/etc/postfix/main.cf : Postfix configuration parameters
/etc/mailname : This is where you set the domain name of the system, has seen by the other. It needs, in most cases, to look like a real domain name, otherwise, the next smtp server on the road might refuse the mails originating from your machine.
In this example, I choose hell.com.
/etc/aliases :
The place you define aliases. For instance, it is quite good to redirect all mail to root to your normal user.
Here:
# Added by installer for initial user
root: myuser
From now on, you will be able to get system notice using mutt with your myuser user.
/etc/postfix/main.cf :
The place we are going to make a few changes. Let’s say I want to be able to relay mail sent to user at mydomain.org to my personnal adress nik@foo.bar.
In the first place I need to define a virtual alias domain.
virtual_alias_domains = mydomain.org
Then, we need to tell postfix where the alias database is:
virtual_alias_maps = hash:/etc/postfix/virtual
Adding those 2 lines is sufficient to make your box treat the mail sent to linux.org. Now, we need to tell postfix what to do with the mails.
Create and Edit the file /etc/postfix/virtual and add:
nik@mydomain.org nikfoobar.org
localuser@mydomain.org myuser
@mydomain.org catch-all@foobar.org
At the first line, we say that we want all the mail to nik@mydomain.org to be forwarded to nik@foobar.org.
On the second line we tell postfix to deliver the mails to localuser@mydomain.org to the Unix user myuser.
On line 3, we define a catch-all adress which will forward any mails to mail account to the mail account catch-all@foobar.org.
This is it!
Now we need to regenerate the aliases database as well as the virtual mail aliases dataase. To do so, execute the following commands:
root@laptop:~#newaliases
root@laptop:~#postmap /etc/postfix/virtual
And restart postfix:
root@laptop:~#/etc/init.d/postfix
And you are done Smiling.
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source:http://linuxpoison.blogspot.com/2008/07/13578175808648.html
