Been running my own mail server out of my house for about a decade. It has been glorious. I have always paid for 3rd party spam filtering, both inbound and outbound. Inbound and outbound through a 3rd party helps reduce the attack surface at my house.
My users do not need webmail and I do not offer it. Calendars are done in local clients and shared through invites.
I went with DC powered equipment, with battery backup on the input. My internet and email can stand at least a 24 hour power outage. Its also all solid state and no fans, no moving parts. Its been very reliable, though I do replace the batteries every couple of years. I'm probably over due for hardware updates at this point.
My users do not need webmail and I do not offer it. Calendars are done in local clients and shared through invites.
I went with DC powered equipment, with battery backup on the input. My internet and email can stand at least a 24 hour power outage. Its also all solid state and no fans, no moving parts. Its been very reliable, though I do replace the batteries every couple of years. I'm probably over due for hardware updates at this point.