Fast, reliable, & powerful email delivery software for Email Service Providers

Need an MTA or even a complete email marketing platform?

Smarter email solutions for you and your customers.

To improve subscriber engagement, your customers expect an enhanced email software experience. When you choose GreenArrow, you get a high-performance delivery engine for fast, reliable bulk email communication, plus an optional email marketing application that’s easy to use. Give customers exactly what they need to build better campaigns.

OnPrem vs Cloud
Enterprise-Grade OnPrem & Cloud software
Deliverability Features
More deliverability-enhancing features
Email Marketing
Optional, integrated email marketing app
OnPrem vs Cloud
A superior support team of experts

8M+ Per Hour

Send Fast:
Get your messages out quickly and efficiently. Send over 8 million messages per hour.

200M+ Per Month

Hundreds of millions of messages per month per server/account or more

8B+ Per Month

GreenArrow customers send over 8 billion messages per month combined.

Need a more powerful On-Premises Mail Transfer Agent?

Send your volume faster.
Deliver smarter with GreenArrow Engine.

GreenArrow Engine API

Looking for a Cloud solution?


“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

Need a complete email marketing platform?

Help customers learn from subscribers and grow better relationships.
Help them build smarter with Marketing Studio.

GreenArrow Marketing Studio Template

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.

Ready for a test drive?

We educate generously so you can control the technology, not the other way around.

Schedule a demo with us and we’ll help you figure out how it can work for you.

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