What are ECO and DMA?

You might spot these two names when reading about email certification or compliance frameworks. Here's what they actually are and why they come up.

eco (short for Association of the Internet Industry) is Germany's largest internet industry association. It's one of the co-founders of the Certified Senders Alliance (CSA), which is probably the main reason you'll see eco mentioned in email deliverability conversations. Beyond CSA, eco sets technical and policy standards for how the internet industry should operate in Europe, and it carries real weight with European regulators.

The DMA (Data and Marketing Association) is a marketing industry body, primarily known in the UK, with affiliated chapters in other countries. It publishes guidelines on email marketing ethics, consent practices, and consumer data handling. Its code of practice isn't law, but members agree to follow it, and it often aligns closely with what GDPR and national regulators expect from senders.

Neither organization will knock on your door if you send a bad campaign. Their influence works differently: they shape the standards that certification programs like CSA build on, they educate their members, and they contribute to regulatory conversations. If you're pursuing CSA certification, you'll be working inside a framework that eco helped design. If your agency or ESP is a DMA member, their practices are expected to meet DMA's code.

For most senders, the practical takeaway is this. eco's standards matter most if you're targeting European recipients or pursuing CSA certification. DMA guidelines matter most if you're operating in the UK market or working with a DMA-member agency. Neither is something you have to join to send good email, but knowing they exist helps you understand where certification requirements come from.

Curious how CSA certification actually works in practice? The CSA certification process is a good next read.