On Sat, 15 Apr 2023, Sebastian Arcus via Exim-users wrote:
> I have a number of Exim servers behind a NAT gateway (actually connected with
> vpn's to a cloud vps - but I'm hoping this is not relevant to this post). I
> would like the gateway to send incoming port 25 traffic to the correct Exim
> server based on SNI in incoming TLS packets - as different Exim instances
> serve different email domains. The setup would look like this:
>
> [Internet]
> |
> |
> (smtp port 25)
> |
> v
> |
> [Cloud server]
> |
> v
> |
> ----------------------------------------
> | | |
> | | |
> [Exim server 1] [Exim server 2] [Exim server 3]
>
>
> I would have preferred to do this at IP tables level - but apparently not
> really possible. It seems the next option would be HAProxy. Has anyone here
> used HAProxy or run a setup as above, or know if this is actually doable? Any
> suggestions much appreciated.
Will the mail storage be on these machines running exim ?
Don't forget about balancing dovecot, or whatever will make the mailboxes
available to your users, too.
Since you have different domains, my first thought would just be to
assign them different MXes with different IPs ...
--
Andrew C. Aitchison Kendal, UK
andrew@???
