I have an Exchange vm setup the last 3-4 years now. I use smtp2go for outgoing email. Works really well. I primarily use the system for alerts emails and mailing lists I use. If it breaks its an annoyance but nothing critical. I have a mail filter in front that all incoming mail goes through.
decstation
joined 1 year ago
I have the Proxmox mail filter in front of my Exchange. It works wonderfully well. No spam gets through.
Put anything you don't trust into their own VLAN. For me that includes the kids pc and iot devices. Give them only internet access with no access to other internal networks.