See "man 5 postconf" for "inet_interfaces":

"When inet_interfaces specifies just one IPv4 and/or IPv6 address that
is not a loopback address, the Postfix SMTP client will use this
address as the IP source address for outbound mail."

---<main.cf>---
inet_interfaces: 210.210.210.214, 127.0.0.1

--
Greg


Przemk0 wrote:
> Hi..
>
> I have more than one IP for my server, for example :
>
> 210.210.210.210
> 210.210.210.211
> 210.210.210.212
> 210.210.210.213
> 210.210.210.214
>
> Interfaces :
> eth1 (main) has address : 210.210.210.210
> and aliases :
> eth1:0 has address : 210.210.210.213
> eth1:1 has address : 210.210.210.214
>
> Domain :
>
> server.com has address 120.120.120.120 (www serwer from other firm)
> mail.server.com has address 210.210.210.214
> bla.bla.net address 210.210.210.210
>
> Our email adresses :
>
> przemk0@server.com (main domain)
> przemk0@bla.bla.net (virtual domain)
>
> Postfix configuration :
>
> ---
>
> myhostname = server.com
> mydomain = $myhostname
> alias_maps = hash:/etc/aliases
> alias_database = hash:/etc/aliases
> myorigin = $myhostname
> mydestination = $myhostname
> mynetworks = 127.0.0.0/8, 192.168.0.0/24
> relay_domains = $mydestination
> inet_interfaces = 210.210.210.214, 127.0.0.1
>
> virtual_maps = hash:/etc/postfix/virtual
>
> ---
>
> The thing is that when am sending email using przemk0@server.com it goes
> from IP 210.210.210.210 :
> Received: from server.com (unverified [210.210.210.210])
>
> and i want to send my mail's from : 210.210.210.214
>
> I was trying maybe to change myhostname to mail.server.com and mydomain
> and myorigin to server.com, it didnt work :
>
> Received: from mail.server.com (unverified [210.210.210.210])
>
> Help :)
>