On Wed, Aug 6, 2008 at 6:23 PM, Graham Leggett <[EMAIL PROTECTED]> wrote:
> Graham Leggett wrote: > > Because traffic from machines behind the box can cause the mailserver's IP >> to be blacklisted, the mailserver machine has two IP addresses, one for the >> mailserver, and one for NAT. >> > > Just to be clear - the box has two public routeable IPs on the same > interface. > > The first public routable IP address is used by the mailserver to bind to, > and this IP is where the mailserver receives mail, and is the IP address > listed in inet_interfaces and should in theory be the source address. > > The second public routable IP address is the address to which the NAT > network is translated to. In practice, postfix is using this address as a > source address, when it shouldn't do so, causing outgoing mail to be > blacklisted and bounced anyway. > If your network is doing things to get itself blacklisted, fix the problem! Filter outbound SMTP, cleanup your network clients, whatever. Don't try to use a different IP to avoid doing the right thing and then ask other mail admins for help so your network can continue to pollute our networks! > > Regards, > Graham > -- >
