I've been running my own mailserver on a firstnamelastname.com domain for nearly 15 years.

As far as I can tell, nobody blocks it. Google sometimes rejects emails where the from address doesn't match the real sending address, which is fair.

I guess the first couple of years were rocky, I hadn't figured out DKIM and SPF and all the other blood rituals yet. Back then I got blocked by Steam and banks. But ever since I set up the correct security it's been fine. Been my primary email for a long long time. All my online accounts are tied to it.

Incidentally, I also have free and unlimited aliases. But I don't usually bother because I have a rule to route all messages to unknown addresses into a special folder. I can give out any random address at my domain and it will always make it back to me. So much more convenient than logging into the website to generate an alias.

I did that too years ago, but the management of it was kind of annoying. DKIM was just getting introduced when I stopped using it. SPF had controversy. I understand both of those are awesome now.

The biggest issue was if your ip address got listed in a RBL (Realtime Blackhole List), and then nobody would talk to you. Some were easy to get off, others were permanent blocks, and I found those to be constantly interfering with the delivery of mail. At least the rejection would usually tell you which RBL blocked you.