You have no choice. You must take email delivery problems seriously. Very seriously. Why? Because every percentage point of improvement in your email deliverability is a potential improvement in your email marketing ROI. You might think there’s no real difference between an 81.5% email delivery rate and an 82% email delivery rate. Not really, you say, that’s such an insignificant number. But if half a percentage point equals 1,000 more inboxes, and you have a conversion […]