DIY email marketing software is a more technical solution that gives you full control over your messages. You are responsible for installing and hosting the software on a VPS or dedicated server and handling unsubscribe requests, email bounces, complaints and blocks yourself. Much can be handled by the software automatically, depending on its features. While it is more challenging, it can be far more cost-effective than hosted email marketing services.
(List of individual email marketing softwares coming soon…)