High Availability

Hello friends
I would like to know if there is a way to have “HA” High Availability with email and proxy feature in NethServer and if there is any procedure to follow.
The intent is if one SMTP server stops the other I took over.
VIP IP is no problem

Active passive or Active active

I had a case of network intermittency, where my SMTP was “5 - 10” minutes without responding and came back, many emails stopped being sent


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This can be done at proxmox level, there is no easy way to achieve it inside NethServer. High availability is a software concept but also hardware.