As the GDPR deadline of May 25th, 2018 approached, one of the biggest mistakes many European senders made was to leave everything to the last moment. By that stage, many email subscribers were completely overwhelmed by inbox overload, and their simplest response was “ignore everything!” As a result, lists were decimated – research from Yieldify showed one-third of marketers lost over 30 percent of their email lists, with Travel (37 percent), IT/Telecoms (32 percent) and Finance (28 percent) being the most…