I was until recently using protonmail for throwaway email addresses for various web forums as it allowed a captcha verification during creation. Every other one I'd tried demands SMS verification these days, which is right out. But proton mail recently changed and requires SMS or another email now, I believe they say it is to combat bots.
I tried tutanota but it refuses to create an account at all over a VPN, or at least the VPNs I've used. At least it told me the reason it was a no go here instead of silently failing.
I use Fastmail's aliases. It's not secure if you're trying to hide from state actors (your identities will be tied together in Fastmail's servers), but it's good enough for "I don't trust this forum not to get hacked and leak my email".
Many websites now refuse to create an account for you if your email uses a more exotic domain, or especially the domains used by the many temporary email address providers unfortunately.
Were you using Tor Browser ? From Switzerland, I can create free Proton accounts by solving a captcha, if I'm using Safari or Firefox. But if I use Tor on the same computer, the only option is to enter a phone number.
I tried tutanota but it refuses to create an account at all over a VPN, or at least the VPNs I've used. At least it told me the reason it was a no go here instead of silently failing.
Anyone have any recommendations in this space?