I am currently building a site that will use newsletters, email notifications for new posts and email notifications for new comments on posts.
I keep going back and forth between running this through third party sites and doing it solely through my WordPress website. I should mention, when I say third party, I am including the WrodPress.com email/comment subscriptions built into Jetpack, maybe FeedBurner for new post emails instead and I am considering MailChimp.com for newsletters.
If running it myself, I haven't decided on any plugins yet, but I know plenty are available.
I suppose my main reasoning for wanting to run everything myself is so I can have a more fine level of control. I can email specific user roles, etc. As well, I am not a big fan of the double opt-in used by MailChimp and Jetpack. Double opt-in simply annoys me. I prefer ReCaptcha or some other anti-spam method on the signup form
I have been trying to come up with pros and cons on each side, other than double opt-in (which I understand, can be a pro or con for both depending on your views), what are pros and cons of each method?