Stan Hoeppner:
> On 12/15/2011 8:19 AM, /dev/rob0 wrote:
>
> > The old default of most MUAs to use port 25 was wrong, and it is now
> > coming back to haunt you. That said, you have workarounds:
> >
> > - Use a different IP address for port 25 MX and submission mail
>
> If *all* your MUAs submitting to TCP 25 are on a known internal subnet,
> such as corporate network desktops, the fix is even easier as it
> requires no MUA reconfiguration. The following assuming your Postfix
> server is Linux.
[iptables]
Or simply list the clients in mynetworks.
Wietse
