I'm still operating a personal email service. It's become more challenging, using TLS, DKIM, SPF, and anti-spam technologies, but I think it is still worth it to keep some measure of control. It makes troubleshooting easier when you can see the logs from the MTA. I've also become a fan of the OpenBSD smtpd/pf/spamd triumvirate for controlling spam. It's effective, without being super complicated.