if I have communications with someone through the internet with a homeserver. I would inevitably give out my IP address. Is that a bad thing? In my country they don’t have services like that, RTCing would be a bit sluggish using available euro servers.
So the only issue is that you can’t send emails to people using those providers?
In the best case yes. Although there are some providers that allow you to proxy outgoing SMTP connections through their highly trust rated servers. But that at point you might as well get a cheap email with your domain provider and only host other stuff from home. Less hassle.
Edit: a lot of email even if not immediately visible by the domain name is hosted by the large providers or uses a similarly strict spam filter. So IMHO it is almost impossible to avoid issues.