Not an "instead of" approach, but the best thing I'd implemented when running an ecom site was a typo detector that prompted people to fix their email if it loo

Not an "instead of" approach, but the best thing I'd implemented when running an ecom site was a typo detector that prompted people to fix their email if it looked wrong, like "joe@gnail.com", "Did you mean joe@gmail.com?". At the time I used "mailcheck": https://github.com/mailcheck/mailcheck https://github.com/mailcheck/mailcheck There appears to be a more modern implementation here: https://github.com/ZooTools/email-spell-checker https://github.com/ZooTools/email-spell-checker It reduced the amount of badly entered emails more than any other approach I tried.