I’m aware most ISPs do not allow for port 25 to be open for email use outside of business licenses, but at what level is that controlled? Can I get around that by owning my own router? Owning my own modem or ONT? Or is this just a thing they mystically control further up the pipeline that a relative layman such as myself can’t get around?
I just looked they have a service called “alternative port 25” that addresses this issue.
Honestly though, once you start adding up costs for these workarounds you have to wonder if it’s easier to just get a business internet circuit, cloud security gateway, or just host the email online.