GreenArrow CloudMTA

The power of your own MTA with the simplicity of an Email API

GreenArrow CloudMTA is a cloud-based mail transfer agent (MTA) designed for email service providers and high-volume senders. It provides the power and flexibility of owning your email sending pipeline without the need for managing the sending infrastructure and without vendor lock-in.

Built for ESPs and Large Senders

Designed for the needs of ESPs and large senders. Full transparency on all deliverability details, and access to MTA settings if you want them.

Escape Vendor Lock-In

For ESPs, your customer’s DNS setup will not lock you into our solution, and will reference your DNS hostnames, not ours. Full access to DKIM private keys.

Hands-On Migration Assistance

We roll up our sleeves and work with you to accomplish a seamless migration to GreenArrow, covering both tech and deliverability.

Support by Industry Veterans

Our team has a combined 150+ years in the email industry. We truly partner with our customers.

Reliable and Scaleable

GreenArrow CloudMTA is the same software and architecture that has reliably sent billions of emails per day for our OnPrem senders.

A Proven, Stable Partner

GreenArrow has delivered email for ESPs since 2006. We’re not owned by an SMS company — we work for our customers.

Future-Proof

You can always migrate to running GreenArrow MTA OnPrem on your own infrastructure, without having to change software.

Superior Total Cost of Ownership

Competitive pricing, backed up by an experienced team and a powerful product.

Why our customers love working with us

“Their deliverability, their integration abilities, customization, especially for the price is above and beyond what we were expecting.”

Marcus Bointon

Synchromedia
“Working with the GreenArrow team has been an absolute treat”

John Moody

Klaviyo
“GreenArrow deeply understands deliverability and email infrastructure. Every interaction has involved someone who clearly knows their domain.”

Mike Arsenault

Queen One / Rejoiner
“It’s really a unique experience to work with such a knowledgeable and hands-on team with a system that performs really well. It’s been great to partner with GreenArrow.”

Reba Moyes

Vero
More success stories
Why GreenArrow?

Deliverability details optimized

We provide a managed email deliverability service. With over 150 years of combined industry experience, our experts take care of the technical details for you. We'll help you:

  • Manage delivery rate limiting, warmup, and IP routing to enhance deliverability
  • Monitor the health of email delivery, consult with you, and fine-tune to enhance delivery
  • Ensure SPF and DKIM authentication are protecting your email
  • Monitor for blacklisting of domains and IPs

1
Configuration APIs

Configuration APIs for extensibility and customization

Our API endpoints provide programmatic interfaces for configuring your CloudMTA to suit your needs.

  • Configure sending domains, DKIM keys, and IP routes
  • Manage branded DNS entries owned by you (not us)

2
CloudMTA console

Actionable Statistics and Reporting

Benefit from our comprehensive statistics and reports on your email delivery and subscriber engagement. Track clicks and opens, analyze bounce and deferral messages, track sender reputation, and identify delivery issues across all your domains, IPs, and mailbox providers.

  • Comprehensive reporting on SMTP transaction results and error codes.
  • Transparent click & open tracking to assess subscriber engagement
  • Filter and narrow data to pinpoint issues faster & more accurately.

3
GreenArrow Engine Cloud Encryption

Bounce & feedback loop processing

Our automatic processing keeps your email list clean by identifying bad email addresses and spam complainers.

  • Categorize bounces into 23 different reason categories
  • Customize bounce classification rules with your own regular expressions
  • Receive spam complaints with feedback loops to reduce future complaints and identify problem spots

4

High speed, high-volume email delivery

Our powerful email delivery network boosts your performance and delivers your email quickly and efficiently through highly scalable, highly redundant, fully-managed sending infrastructure dedicated to you.

  • Inject email through SMTP or HTTP API
  • Message batching and compression through HTTP API to improve performance
  • Delivery rates of tens of thousands of messages per second
  • Flexible pricing plans that meet your requirements

5

Event delivery to HTTP webhooks

GreenArrow Engine gives you the information about your email delivery so you can build powerful integrations with your existing business processes.

  • Get notified of Clicks, Opens, Bounces, Deliveries, New Messages, and more
  • Secure event delivery with client certificates
  • Receive complete delivery data, including source / destination IP, delivery status, SMTP timings, and optional custom tracking ID that you assign to each email.

6

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.

See our Cloud pricing
Schedule a free demo

Looking for an On-Premises Solution?

We’ve got it.

For On-Premises software which you manage and run on your hardware or your own cloud servers, see our GreenArrow Engine On-Premises Edition ›
Not sure which is right for you? Review our On-Premises vs Cloud Comparison ›

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