Smarter email solutions for
Email Service Providers


Our software is ideal for Email Service Providers whose customers expect an enhanced experience in order to improve their subscriber engagement. We provide both the high-performance delivery engine, plus an optional email marketing application that’s easy to use so your customers can quickly start building their campaigns.

Learn more about how our software supports your business and theirs.

Need a more powerful Mail Transfer Agent?

GreenArrow Engine API

Send your volume faster.
Deliver smarter with GreenArrow Engine.


Need a complete email marketing platform?

GreenArrow Marketing Studio Template

Help clients grow subscriber relationships.
Build smarter with Marketing Studio.


More features for Email Service Providers:

  • Serve all of your customers on a single server with sub-accounts
  • Set fine-grained permissions to access IPs, Virtual MTAs, and domain names for each sub-account
  • Limit message volume and subscriber count, and set automatic warnings as they approach quotas
  • We offer white labeling so you can show off your own brand by customizing style sheets and images
  • APIs for setting up accounts, managing account permissions, and getting billing data

Our dedicated team of problem-solvers supports our customers with expertise and with compassion.

“Highly customizable, Lasso has a lot of highly unique requirements and GreenArrow is the only platform that could meet our needs.”

Travis Edgar

Lasso CRM

When it comes to tips and resources, we educate generously so you can control the technology, not the other way around.

Ready for a test drive?

When you’ve got questions, there’s nothing quite like seeing our software in action. Schedule a demo with us and we’ll help you figure out how it can work for you.