I recently implemented this using the great Mailcheck library. So if someone types "gnail.com" or "gmail.con" it detects it and we can show "Did you mean gmail.

I recently implemented this using the great Mailcheck library. So if someone types "gnail.com" or "gmail.con" it detects it and we can show "Did you mean gmail.com?". If someone ignores the suggestion, fair enough. If someone purposely wants to give us a junk email, fair enough. At least we're not frustrating them needlessly. https://github.com/mailcheck/mailcheck https://github.com/mailcheck/mailcheck