On 15.04.23 21:54, Sebastian Arcus via Exim-users wrote:
The "back-end" machines are physical machines, on regular ADSL/VDSL/cable/fibre connections at various locations.
At the moment they send directly to the internet, which requires a static IP and PTR record.
To solve all of the above issues, I am looking into essentially diverting all the outgoing and incoming smtp traffic of these servers through a single gateway server, which will be a vps/cloud server.
Well, that's off-topic on the Exim-list, but maybe a VPN solution would fit better. Put three additional static IPv4 addresses and IPv6 /64 on the VPS, build a Wireguard VPN between the VPS and the Exim servers and use the VPS as a "proxy" on IP level.
Or move the three Exim servers - as virtual machines - into the datacenter where the VPS runs. Running servers on consumer or even cheap enterprise access services will not ensure high availability.
Regards, Paul -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
