I'm sure if someone wanted to they could find plenty of free email services that aren't blocked by undernet. If someone really wants to scam undernet like this, they'll find a way. I'm sure a lot of these email services probably aren't very secure too, which probably isn't important to someone scamming undernet but is to a legit user like me. Anyone who owns a domain has an infinite number of addresses too. People shouldn't have to own a domain to register a channel though.
I agree but i don't think if you own a domain you will actually risk getting yourself caught by registering multiples using your domain, that would be plain stupid plus a waste of your money.
Undernet should try to find another way to verify channel owners. If the user is registering channels that are active, which is a requirement, I really don't see how this hurts anyone. IRC doesn't exactly have the numbers it used to anymore anyway.
Inconvenient as it sounds that's how system works, there won't be any changes in the future and NO
mandatory to use X services or registering a channel using X services, it's more like a priviledge rather than something granted which can be revoked at any point.
The ISP I am posting from isn't mine, I'm just borrowing it. I don't have my own ISP as I tend to move around a lot. I really hope there is never any need for undernet to email me because, as mentioned, that address has been off for almost 10 years and there is apparently nothing I can do to fix this short of buying a domain and some hosting (which I can't really afford).
I'm sorry but unfortunately there is no solution to your issue whatsoever, I truly wish there was. You either use ISP e-mail which CService recommends or any other email whether it's free or paid. Like you said, there are plenty of free emails which are not yet blocked, so feel free to search. Good luck