An easy-to-use SaaS application that allows you to quickly verify mailing lists

Ultrafast, robust and easy-to-integrate email verification API

Easily connect your Bouncer account with marketing platform you love, and verify your email list effortlessly

Identify invalid, malicious, or fraudulent email addresses at the moment of entry.

Forget about manual email verification. Just connect to your CRM, configure, and let Bouncer do the rest.

Identify if your email list contains any toxic email addresses

Improve your email campaigns by enriching customer data with publicly available company information

Test your inbox placement, verify your authentication, and monitor blocklists

Check how active your contacts are in their inboxes overall!

Accuracy you can trust. Results you can prove.

CASE STUDY

YOCTO

YOCTO is a lifecycle marketing agency working with high-volume DTC ecommerce brands.

With Bouncer, YOCTO safely validated legacy email lists and protected clients’ sending reputation during complex reactivation campaigns.

Sign up now and validate 100 emails at no cost.

90,960
Reactivated customers successfully re-engaged
$4.56
Cost per reactivated customer (CPA)
Lists
Safely reactivated without harming sender reputation

About YOCTO

YOCTO is a lifecycle marketing agency that works with DTC ecommerce brands, primarily in the US, supporting teams that depend heavily on email as a revenue channel. Their clients rely on YOCTO to manage complex email ecosystems, from campaigns and automations to segmentation, analytics, and long-term list health.

Email performance sits at the center of YOCTO’s work. To drive results without risking deliverability, the agency focuses on clean data, smart segmentation, and responsible list management. That approach helps brands protect sender reputation, re-engage dormant customers safely, and turn email back into a predictable growth channel.

The Challenge

High-risk list reactivation

Before integrating Bouncer, YOCTO faced a complex deliverability challenge while working on large-scale email reactivation projects for ecommerce clients.

Dormant and unreliable profiles

Large portions of legacy databases consisted of profiles that had not been contacted for years — in some cases, over a decade. Due to past ESP migrations, many profiles lacked historical engagement data, making it unclear which addresses were legitimate and safe to email.

Severe deliverability risk

Reactivating these lists without proper validation posed a serious threat to sending reputation. Since email was a primary revenue driver for the client, a single mistake could have damaged inbox placement, throttled campaigns, and caused long-term harm to the entire email program.

The Result

YOCTO partnered with Bouncer and saw instant results:

Safe reactivation at scale

Email validation made it possible to segment dormant profiles responsibly and reintroduce them into campaigns without harming sender reputation.

Meaningful customer reengagement

As a result of the reactivation strategy, 90,960 previously dormant customers became engaged again, turning old profiles into active, revenue-generating contacts.

Lower acquisition costs

Reactivating existing customers proved significantly more efficient than acquiring new ones, with a cost per reactivated customer of $4.56.

Conclusion

For agencies and brands that depend on email as a core revenue channel, YOCTO’s experience shows that reactivation only works when deliverability comes first. Without proper validation, even high-potential lists can become a serious liability.

Bouncer gave YOCTO the confidence to validate legacy databases, segment responsibly, and reintroduce dormant profiles without risking sending infrastructure. As a result, email reactivation turned from a high-stakes gamble into a repeatable, scalable process.

With automated validation and clear keep-or-suppress guidance in place, YOCTO can safely bring inactive customers back into the funnel while protecting inbox placement and long-term email performance.

George Kapernaros
CEO of YOCTO
In my view, everyone who has a high sending frequency and needs to keep deliverability healthy should take a look at Bouncer’s validation solutions. For high-scale reactivation cases like ours, Bouncer is a complete no-brainer.

See why top data providers trust Bouncer to power cleaner contact lists

Recover lost leads, cut bounce rates, and deliver data your customers rely on.

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