Assuming that your ISP will create PTR record for you and does not block port 25 (since version 0.40 that is not the case ), has anyone tried running MIAB on the new version (4) of Raspberry Pi from home?
Looking at the Ubuntu website there is Server Version 18.04.5 with 64-bit available for both v3 and v4 of RPi
seems like offtopic, but jfyi: i’m successfully running miab on intel computestick w/128gb sd card from home - nice solution when you need low-wattage and tiny-sized server.