Earlier this year Jason Siffring posted a great article on how to use a transactional email service for ExpressionEngine emails. I was working on improving mail over Mijingo and needed to refer to the article.
Jason even gives you a great comparison of third-party email services. Also, note the Escort add-on that will make it easier to interface with the service APIs.
Has a client ever said to you, “Why didn’t I get that reset password email?” Have you ever had to wait patiently for like ten minutes to get a new member activation email? Ever lose sleep wondering if your contact form is really working? If so, let me introduce you to the wonderful world of transactional email delivery services.