Russian locale, firefox 69 on fedora linux 30 and on macos. Clicking "register" on the website, entering [email protected] for an email, long gibberish for a usename, and qwerty12 for a password. Expected: email confirmation sent. Actual: it prints "We cannot create an account for you. Please contact the webmaster."
Isn't mailinator.com a throwaway mail site? If yes then it is likely simply in the black list, using it to sign up for OSM would be a violation of the ToU in any case.
In other words: not allowing the sign up is expected and desirable behaviour.
Yes this is the expected behaviour for a blacklisted email domain.
Perhaps the message can be optimised
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Perhaps the message can be optimised