Installed this plugin the other day and all’s going well, except it allows you to subscribe over and over again using the same e-mail, and sends out the welcome e-mail each time.
This seems…bad. Like, really exploitable. We’re using the plugin to send out monthly newsletters for an upcoming indie game that’s getting a pretty fair amount of attention, so the idea that someone could use an exploit like that to screw with our site isn’t too far-fetched.
Is there a way to fix this?
Any help is appreciated!