You're best off using the PROXY protocol assuming your application(s) support it.
tjr
This is completely standard for residential ISPs at least in the US. Your options are to either host this elsewhere or use a smarthost (somewhat of a proxy) for outbound mail.
gitlab, several docker containers, kbin, ircds, a bouncer, 3-4 web servers, a couple seperate mysql servers, Handshake DNS hosting and Handshake nodes
Proxmox is all I use for VM hosting, it is well worth it IMO, I colo metal and I host several virtual machines on it, webservers, ircds, kbin, etc. I specifically use Virtual Machines (KVM) however, it does have the ability to do containerization too (LXC).
yeah, I've been getting hammered in my transport queue from this. I guess if this is intentional it is worth just defederating to avoid spamming the queue and logs.
I use Ubuntu latest LTS for all my servers
I will update this thread if/when I find out more information regarding this.
Probably not a bad idea to enable S3 support
Take a look at Pine64 Quartz64 boards as a decent alternative