That's a temporary reprieve. Gmail started hard-requiring an x-unsubscribe header for anyone that sends more than a couple hundred emails to gmail. It isn't har

That's a temporary reprieve. Gmail started hard-requiring an x-unsubscribe header for anyone that sends more than a couple hundred emails to gmail. It isn't hard to put in, it's just that the lower effort mailers need to adjust and don't have visibility on their own spam rates.