On 05/18/2011 08:52 PM, Vick Khera wrote:
On Wed, May 18, 2011 at 2:30 PM, evilgh...@packetmail.net
<evilgh...@packetmail.net> wrote:
I'm certainly open for any suggestions for accommodating my goal of applying an
IPv4 relayhost to non-IPv6 capable traffic if there is such a way to accomplish
this goal with the existing configuration directives.
What if you do this: eliminate the ability of your mail server to send
SMTP over IPv4, possibly by removing any IPv4 address from it, or
firewalling that ability away.
Set up fallback_relay on this host so that all mail that did not make
it on the first try goes to your relay host. There will be *some*
IPv6 capable traffic sent that way as the result of transient
failures, but it will be mostly messages that require IPv4.
Limit THIS postfix to ipv6 exclusively.
Set up a second instance with both ipv4 and ipv6.
Set the fallback-relay to the second instance.
inet_protocols = ipv6
fallback-relay = [::1]:25025
And on the second instance:
inet_protocols = all
relayhost = [your.ipv4.relay.host]
And in master.cf:
::1:25025 inet - - - - - smtpd
--
J.
