Postfix change sender domain
Out of the box postfix is sending emails using the domain name that is returned by the following command in the linux shell:
uname -n
In this case, the sender is the system user that runs the script.
An example could be [email protected].
In order to change the domain that will appear in sent letters and the name of the user from whom the sending is made, you need to edit the file /etc/postfix/main.cf with the following line:
smtp_generic_maps = hash:/etc/postfix/generic
After that, edit the file /etc/postfix/generic
Then run the following:
postmap /etc/postfix/generic
And restart postfix for the changes to take effect:
service postfix restart