The WordPress plugin that I use to send all my review emailsMailIt is the WordPress plugin that I originally wrote for my own business when I became frustrated with the inherent unreliability of many of the traditional email services. Since creating it I have personally used it to send all of my review, and affiliate promotion emails. With MailIt I consistently get high open rates (18-20% on average), strong deliver-ability, and complete control over my list management all while avoiding a high monthly fee.
A quick note about the reviews on this site: I am an affiliate for every product I review. The vendors of these products give me them without charge in order for me to test them. However all my reviews are done as honestly as possible and I make no promises to the vendor prior to writing my review. Should you click a link on this site that takes you to a paid product this link will be an affiliate link and I will be paid a percentage of the sales price should you decide to purchase that product.