Just to amplify on this, Discourse offers an opportunity to correct email after signup as of version 1.8.
Also @InspektorCluzo users can initiate “forgot password, please send me an email to reset” on their own, as much as they like.
We also added an “oh no I can’t get an email” help page in 1.9, triggerable via the help button above.
well, there are rate limits on password reset requests, but you know what I mean