One email API, no more frustration.

Tired of your email ending up in spam, and then having your support deal with bounces, unsubscribes and delivery errors?

What if you could automatically catch failed emails and retry them through another provider? Introducing Flute Mail.
How it works
Drop-in dashboard for your provider.

A good email provider isn't enough. You also need delivery optimization services.

Bounce handling and retry functionality should be independent from your email provider. Learn more ›

router Unified Email API

Tired of switching email providers looking for better deliverability? Is your code locked-in to a single ESP? It's time to switch to an independent API with universal integrations, and independent data storage. Learn more ›

refresh Unbouncer

Valid emails can bounce, it happens. But if you wait for your team to manually deal with mistaken bounces, you've already lost your customer. Learn more ›

backup Smart Failover

No email provider is perfect. Temporary blacklist issues, congestion delays, or even downtime can happen to anyone. That's why we don't do email delivery. Learn more ›

How It Works

Flute sits between you and your email API provider(s).

  1. Signup and add your provider API keys
  2. Configure your "Virtual Flutes" to segment different types of email
  3. Start sending through our API

And then sit back and relax, while our store-and-forward queues take care of your email routing, bounces, and content storage.

Critical Emails

Providers

closeSendGrid
checkPrivate Servers

Before Flute

face
96%
Delivery rate

After Flute*

face
99%
Delivery rate
Transactional Emails

Providers

closeAmazon SES
checkPostmark

Before Flute

face
93%
Delivery rate

After Flute*

face
98%
Delivery rate
Promotional Emails

Providers

closePostmark
checkSparkPost

Before Flute

face
75%
Delivery rate

After Flute*

face
90%
Delivery rate

Flute makes it easy to follow industry best-practices for boosting deliverability. Now it's trivial to do segmentation, good bounce handling and reputation management.

  • The Flute Deliverability Guarantee: If you don't see a significant improvement in your overall open/click rate after integrating Flute, we'll refund your money, no questions asked. Read more.

Delivery optimization tech developed at the University of Toronto. Read the first whitepaper.

Ready to optimize your delivery? Hook up your provider in minutes.

Drop-in dashboard for your provider.