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.
One thing:
Hosting email at home is not possible at all. Since you didn’t rent a static IP address and set the inverse zone of your email domain, most public and common email servers will auto-block you.
It’s not impossible – if everyone starts doing it, then most public and common email servers cannot block them.
Self-hosting without applying these checks (which would involve signing a contract and exposing property data about the static IP address) is a thing used by spammers and they have the blocking automatized most times.
That’s just not true. It is, some might say, ridiculously hard to do because these days there are so many i’s to dot and t’s to cross, but it’s not impossible. A friend hosts his domains’ email at home.
For that, that person must have paid the static IP address.