Currently yes. I have a bit of a non-standard setup though. Like a business contract with my internet service provider, which includes a few perks that are required to send mail and are missing on a normal residential internet connection (static ip, dns reverse pointer). And generally 95% of people recommend not to do email yourself. I might change in the future. Back in the days it was a few bucks more a month, but they increased prices substantially. Either I move my mailserver to a VPS or save me some time and effort and switch to some email servuce like everyone else.