CASE STUDY
Runna
Runna relies on email to support runners at key training moments.
With Bouncer, they cleaned their lists before a major send and kept deliverability strong.
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About Runna
Runna supports you as a runner with tailored running plans to achieve your goals, from training for a faster 5k to completing your first marathon.
Email is one of Runna’s key support channels. It helps the team send timely coaching content, useful resources, and account updates while reducing avoidable customer support questions.
The Challenge
High-volume email risk
Before a major privacy policy update, Runna needed to verify a large user database without putting sender reputation at risk.
A required send to the full database
Runna needed to notify all users about privacy policy changes. That meant sending to older contacts, not just active or recently verified users.
Sender reputation protection
A sudden rise in transactional email volume could trigger deliverability issues. Runna needed to remove risky emails before sending.
The Result
Runna partnered with Bouncer and saw instant results:
Safer high-volume sending
Stronger email deliverability
Smoother verification process
Runna’s approach to email data quality goes beyond a one-off cleanup.
The team uses Bouncer not only for batch verification before large-scale sends, but also to verify email addresses in real time at the point of entry, directly on its forms.
This gives Runna a more complete layer of protection: existing data can be checked before important campaigns, while new addresses are verified before they enter the database. It’s a practical, deliverability-safe approach that reduces risk at both ends of the email lifecycle.
Conclusion
↑ 99% delivery rate after verification
For Runna, email is a key part of the training experience. It helps users get timely coaching content, subscription updates, and support resources when they need them most.
Before a major privacy policy update, Runna used Bouncer to clean its user database and reduce risk before a high-volume send. Invalid emails were removed, sender reputation stayed protected, and important messages had a better chance of reaching real users.
With Bouncer, Runna kept email verification simple, scalable, and easy to manage: even for a large, one-off project.
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