SuperSend Relay provides the managed email infrastructure that Greenarrow offers as self-hosted—no engineering team required.
Self-hosted MTAs like Greenarrow demand a dedicated engineer. A managed Greenarrow alternative removes this cost and complexity.
Scaling a Greenarrow setup past 100k emails/month requires complex IP rotation. Managed infrastructure automates this process.
Manually warming up domains on Greenarrow is slow and risky. SuperSend Relay automates warmup across hundreds of inboxes safely.
A managed Greenarrow alternative gives you infrastructure control without the server management, letting your team focus on sending.
Teams evaluating Greenarrow alternatives in 2025 are typically facing an infrastructure bottleneck, not a feature gap. You've scaled your sending volume to a point where the overhead of managing a self-hosted Mail Transfer Agent (MTA) is consuming significant engineering resources. The constant cycle of server maintenance, IP reputation management, and manual deliverability fixes becomes a full-time job.
This is a common inflection point for high-volume senders. The control offered by a self-hosted solution like Greenarrow becomes a liability when it distracts your technical team from core business problems. The alternative isn't another MTA to manage, but a shift to a managed infrastructure layer that handles the complexity for you.
SuperSend Relay is built for this exact scenario. It's the managed infrastructure layer you would build on top of Greenarrow if you had a dedicated deliverability engineering team. It provides the scale and control you need, without the server administration overhead.
Organizations don't look for Greenarrow alternatives because the software fails. They switch because their own infrastructure and processes can no longer support the operational load required to run it effectively at scale.
If you're evaluating Greenarrow alternatives, you're making a fundamental decision between retaining full control (self-hosted) and offloading operational complexity (managed). Here's how the two models compare for a team sending 100k+ emails/month across 50+ inboxes.
Self-Hosted MTA (Greenarrow):
Managed Infrastructure (SuperSend Relay):
SuperSend Relay is not another MTA. It's a managed deliverability layer designed to replace the need for a self-hosted solution like Greenarrow entirely. It solves the core infrastructure problems that cause teams to migrate.
SuperSend Relay is not the right fit for every organization. A self-hosted MTA like Greenarrow remains a better choice in specific scenarios. This builds trust and ensures you choose the right architecture.
Migrating from a self-hosted MTA like Greenarrow to a managed infrastructure layer like SuperSend Relay is a phased process focused on maintaining sending reputation.
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