I found a very similar thread dated from last year on this issue, which was given a great response.
I am still not able to understand how to deal with customers who add random characters to their email address (Which gets accepted on the sign-up form as a new email) but gets directed to the recipients original email. (Gmail lets users do this).
Is there a way for me to avoid customers abusing this?
Best answer by Akers DigitalView original