Gary Sellani skrev den 2017-08-01 14:31:
Could the host be something like 10.8.0.0/24?
make a hostname with multiple A/AAAA/MX
to do this one could simply add ip-addr to /etc/hosts with the hostname
wanted for the lan of rfc1918 ips
then change relayhost to
relayhost = smtp:<name-in-etc-hosts>:25
postfix will then use name-in-etc-hosts as a dns mx record
relayhost = smtp:[host on other side of tunnel]
with [] around hostname mx round robin is disabled
this is ok and desired for single ip hostname
# cat /etc/hosts
10.0.0.2 in.localdomain in
10.0.0.3 in.localdomain in
or simple use splited dnsview on public dns
better docs here:
https://en.wikipedia.org/wiki/Split-horizon_DNS
