Sending email from home connections is extremely difficult because almost all providers blacklist home ISPs. You also need PTR to be accepted by Gmail. And with tunnels or VPN you most likely get network issues.

it used to run pretty well on one, but the lead dev made significant changes making it a bitch to run without doing it “his way”. What I ended having to do was change my nginx configuration so that I was using the one in his docker-compose directly as opposed to running my own that would point to his for mail related needs.

I forgot what exactly broke but when I reported that breakage I basically got told “tough shit, it works on my set up”, I don’t remember being demanding or impolite just reporting the issue and asking if he was aware of/had plans to fix it. Not too long after the product was acquired and I chalked it up to enshittification and shitty dev being a shitty dev.

TLDR; good luck and ymmv