I was looking for an alternative to Mailchimp and I discovered Acumbamail at the right time. It's a great lifetime deal that's solving my issues of managing a huge list with not so frequent newsletters, for an honest price. The import procedure from Mailchimp had a quite confusing UI, so I had to do manually import a .csv, but everything went fine. I also appreciated the alert that stopped a campaign because of the number of hard bounces: I managed to clean the list and resend it.

What's missing? A better integration with WordPress. You can have a form on your website, and it has an integration with WooCommerce customers, but I'd love to have a way to automatically add users to a list after they use the WordPress registration, also mapping extra informations to custom fields.

Support is ok, I received replies in 1-2 days.

Definitely worth the price.