When trying to register a new user, then I'm getting this error in the console:
email.send error: Error(code: 7, description: "Couldn\'t connect to server", response: PerfectCURL.CURLResponse)
The "You are registered" message is coming from the LocalAuthWebHandlers.registerPost() function. This function does check for errors, but fails to detect that the email couldn't be sent.
Solution
Modify the Account.register() function so it checks of the return value from the Utility.sendMail() function.
Modify the Utility. sendMail() catch block, so it doesn't discards the smtp errors. Perhaps use the smtp code from the mysql repo.