Get
Sendy, self-hosted mailing software.
(After the show, I got my monthly email bill, and it was—are you ready?—$0.31 USD. Not the $80 I would have spent at Mailchimp. That was for January's mailings.
For December, when I sent more to promote holiday sales and a new release, plus a newsletter for my day job (no need to split accounts!), I spent all of $0.65. So I just wanted to say that yes, Sendy really is cheaper.)