How many Opt In emails are allowed to be sent?
How many times can our company legally send an opt-in email confirmation?
If a user does not opt-in, then returns to our website at a future date and decides to subscribe again but does not confirm the opt-in. Can we legally resend the opt-in?
Another example: a malicious user manually enters an email into our system over and over. The owner of that email address would receive multiple unwanted / unsolisticed opt-in requests.
How do I deal with this type of situation?