How to use an additional IP for mail in Cloudron ?

[JOduMonT]

So;
my Cloudron is behind Cloudflare proxy and still exposing IP because the mx is not proxied.
Hosted at Hetzner I added a Floated IP to test if it is possible to use 2 differents IP so that Cloudflare Warning disappear.

Now my Cloudron have 2 IPv4 but...

how do I tell mail.domain.tld to use my second IP ?

[girish]

@JOduMonT an email server (without email relays) requires a public IP. There is no way around this. Even if you add a second IP, the second IP will be exposed and one can always access your Cloudron dashboard via that IP address. Just have to put an entry in /etc/hosts on my laptop and point that floating IP to my.domain.com and that's it.

I guess you are looking for a way to "sandbox" mail server to a specific IP somehow. We don't have a way to do this in Cloudron. I can move this to Feature Requests.

But also, it might be easier to just create another VM and run mail on the other VM? Security wise , this is the easiest and cleanest instead of writing a lot of code to make sure mail server and dashboard despite being on the same server don't step on each other (networking wise).