I wouldn't call it a lie. I worked for a place that had an IP for years and only sent transactional email from it (i.e. receipts) and one day we started getting

I wouldn't call it a lie. I worked for a place that had an IP for years and only sent transactional email from it (i.e. receipts) and one day we started getting a lot of calls about no receipts. Sure enough, one of the large isps blocked our server. (Yes, spf and doing we're setup.) I'm not saying MailChimp is the answer. The whole system of blacklists is just bad and causes systems like MailChimp and it's kin to pop up.