I guess I just don't understand why you would roll your own. What advantages do you hope to gain in the short run when you have no idea if you'll be around for

I guess I just don't understand why you would roll your own. What advantages do you hope to gain in the short run when you have no idea if you'll be around for the long run? Don't let the excitement of the moment overwhelm you. Building your own email sending system (implementing policies to avoid being black listed etc) complete with analytics is a non-trivial endeavor. 9.9 times out of 10 the smart move is to go with a free mailchimp plan THEN try to roll your own when it gets too expensive. be smart.