I was a huge fan of SendFox for many years but it seems it is no longer being supported. Their AI support just had me purchase additional software to intergrate with my wordpress site. That extra purchase doesn't work. Contacted their support to get an undeliverable response. Off to file a dispute with my credit card if I don't hear back by Friday.
This was a simple platform which was exactly what I needed. I don't need all the bells and whistles and monthly fees of mailchimp, etc.