When we are sendings mails from our server the wrong IP is picked up as outgoing server IP. This worked fine before but when we added more IP's to the server the default server IP is no longer used. As it is now it picks up an ip that is added to eth0 as a alias (eth0:1, eth0:2 ....) the IP that is uses is an IP that is registred in the server and is an alias interface(eth0:1). All outgoing mails from postfix is now sent from that IP (eth0:1) and that IP in't yet used by any domain. Our defalt IP (eth0) is now longer registred as sent or recieved from x.x.x.x in outgoing mail.
How do I change this, I suppose it's in Postfix settings the changes should be done. In General Options there are some setting for network but I don't know if it's there the changes should go. I only want to use one IP(server defalt IP) for outgoing mails.