Switching email service providers (ESPs) can be expensive, time-consuming and stressful. It’s not something you want to do any more often than you have to. That means doing your homework is critical to ensure you’re choosing an email service provider that will be a good fit for years to come. With that in mind, we publish an annual ESP guide, with up-to-date information to help marketers like you navigate the vendor landscape and find the best […]