Email provider

Try using something that doesn't require javascript at all (not even at registration) - For an example DNMX.

This post just took place yesterday: /post/1a48ba79f259056bb650

Should be very helpful for you!

Altaddress. It offers both a permanent email service and a temporary email service. It doesn't require Javascript and you can create 4 free aliases. The onion is listed on tor.taxi or on their clearnet domain: altaddress.org, but the onion link does go down often. Although if you want to compose to people, Altaddress only allows composing and sending emails to other Altaddress users. There is a bug or an issue where if JS is enabled you might not be able to click on newly recieved emails, but this can be fixed by simply clicking "New Identity" and logging back in. They do "log" but nothing important. What they do log is Timezone(wont work anyways with Tor and no JS), your password(obviously. hashed).

This would be a good option, DNMX allowed me to register, but doesnt recognise the user / password combo after that. Weird.

That's weird.

What exactly do you mean? Everything works fully fine for me (without js).

I registered saved the details into password manager, and after registraion, the system doesnt recognise the same credentials on login attempt. If I try to register the same username, the system recognises it as already registered, but cant recognise he password. I registered forums and other sites, and using the password manager for them, no issues.

Maybe you entered the password or username incorrectly during registration, but It should work fine otherwise?

I first type the username into the password manager, generate the password, and copy them even for register. Could be passwordregenerated in error, not sure, but I dont do these mistakes, not twice in a row for sure.

UPDATE:

Done it 3rd time, same result. Is there another email service recommended over this?

You can try Pissmail (pissmail[.]com) or Mail2Tor.

Thank you!