Denylisting whole ip ranges is lazy and hurtful. Google accepts email from residential ips. Why can't you?
> My mail server occasionally receives mail from residential ISPs and it's literally always spam.
I sent mail from my home isp for years, until people like you made unfeasible.
> I do usually get a notification that something hit quarantine so if it sounds important I can still see it, but I've never had to release mail banned for this reason so far.
Most small operators refused to allowlist me even after making phone calls, etc.
> Google accepts email from residential ips. Why can't you?
Because Google receives enough email to tweak its spam filters sufficiently. I have to rely on more general block lists.
> I sent mail from my home isp for years, until people like you made unfeasible.
I've accepted mail from home ISPs for years but a recent-ish (±5 years ago) but short wave of spam from botnets made me turn on the spam filter on my new server.
> Most small operators refused to allowlist me even after making phone calls, etc.
With my setup you won't even have to call me because I'll probably whitelist your server anyway. May take a day depending on how recent the latest quarantine report was, but that's no different from normal email anyway. My spam threshold is quite high so if you take the normal measures (SPF/DKIM/reverse PTR/etc.) you probably won't even hit the spam filter.
> My mail server occasionally receives mail from residential ISPs and it's literally always spam.
I sent mail from my home isp for years, until people like you made unfeasible.
> I do usually get a notification that something hit quarantine so if it sounds important I can still see it, but I've never had to release mail banned for this reason so far.
Most small operators refused to allowlist me even after making phone calls, etc.