Free Tools

Our interactive tools help you discover the full power of Return Path’s data and solutions.

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Universal Feedback Loop

A comprehensive tool designed for feedback loop configuration, management and coordination.

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Sender Index

We know email and we're here to inspire your email marketing.

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Real-Time Email Validation ROI Calculator

See how much revenue you are missing out on from invalid email addresses and your potential ROI.

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We Know Email Clients

Compare opens from mobile, webmail, and desktop.

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Email University

Increase your email IQ and inspire your company’s own marketing efforts.

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Sender Score

Get insight into your email marketing reputation.

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Blacklist Lookup

Is your IP address on a blacklist? Find out now.

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Email Marketing Check-Up

Get a personalized scorecard that will benchmark your email program’s performance against senders for your industry.

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Unsubscribe Calculator

How many subscribers are you losing every year due to unsubscribes? The answer might scare you.

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Sample Size Calculator

Determine what percentage of your list should receive the “test” version of your email marketing experiments.

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