Thijssen:
> OK, nobody has anything to say on this?
> 
> On Fri, Apr 11, 2014 at 1:13 AM, Thijssen <jul...@gmail.com> wrote:
> 
> > We decided to create a special MX for just the bulk mailings within
> > our IP-block, the datacentre network we maintain. Here's where my
> > questions arise:
> >
> > The setup is as follows:
> > - We have many servers within the same range, 10.20.30.x (I'll use
...
> > - Our primary MX that needs to send out the bulk for them all is 10.20.30.7
> > - Is there a way to NOT have to tell postfix to allow the sending
> > domain names, but just the server's IP-addresses that hold those who'd
> > like to send out those mails via 10.20.30.7 ?

Postfix relay control is set up as follows:

    mynetworks = 10.20.30.0/24 127.0.0.0/8
    smtpd_relay_restrictions = permit_mynetworks reject_unauth_destination

Look Ma! No domain names!

Some Postfix versions do the above in smtpd_recipient_restrictions
instead of the newer smtpd_relay_restrictions.

        Wietse

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