Our plugin has been working great for some time but all of a sudden last week it stopped sending confirmations to those who sign up. I checked and it is still keeping a list of who signed up but they are all unconfirmed.
Our site is here
All my plugins and wordpress is updated and there are maybe 1 or 2 a day so it isnt like we are maxing our quote with the hosting server.
what else can I do to troubleshoot?