How SR Pro Used ZeroBounce to Rescue 2,000 Email Addresses for a Healthcare Enterprise

Why SR Pro questioned the quality of 800,000 email addresses

SR Pro’s client had reached its marketing contact limit, but Wasserman saw a bigger problem: the company didn’t know how much of its existing data it could trust.

“The client had a two-million record database and had consumed their entire marketing contact limit, but only about 800,000 of those records actually had email addresses,” Wasserman explains. “So they were paying to hold and manage a large volume of data whose quality nobody had ever really questioned.”

Some contacts had already been labeled as “bounced,” but Wasserman didn’t want to assume every label was accurate.

“What concerned me most was that a lot of contacts were flagged as ‘bounced,’ but we had no confidence those flags were accurate. Some may have been marked bounced by mistake.”

“When your database is full, your sender reputation is on the line, and you can’t trust your own data labels, that’s the moment you have to stop and validate rather than keep sending blind.”

What ZeroBounce found in nearly 800,000 email addresses

SR Pro used ZeroBounce to validate nearly all of the client’s 800,000 email addresses. The results immediately showed how much questionable data had accumulated.

“First, the scale: roughly 128,000 of the 800,000 came back invalid. That was higher than I expected.”

But the number of invalid email addresses wasn't his biggest discovery. SR Pro also identified about 3,000 addresses with slight domain misspellings, such as “Gamil” instead of “Gmail,” “Yaho” instead of “Yahoo,” and “Hootmail” instead of “Hotmail.”

For Wasserman, those typos changed the way he looked at email validation.

These weren’t fake or dead contacts. They were real people we were about to write off over a spelling mistake. Seeing that was the moment it clicked that validation wasn’t just about deleting bad data; it was also about rescuing good data.

Ronen Wasserman, CEO and Revenue Operations Expert

Ultimately, SR Pro recovered roughly 2,000 email addresses affected by domain typos.

The bigger payoff: knowing what was actually in the database

Recovering email addresses was only part of the value SR Pro found in the validation results.

ZeroBounce gave SR Pro information it could use to make more informed decisions about the email list. In addition to identifying roughly 128,000 invalid email addresses, ZeroBounce found about 46,000 known complainers – people who have a tendency to mark many emails as spam.

The client chose to retain those contacts, but it can now take that information into account when deciding how to approach its email marketing.

SR Pro also cross-referenced the ZeroBounce email validation results with data from the client’s revenue operations platform and reclaimed database space against the client’s record limit.

“We recovered roughly 2,000 real, reachable contacts that had been lost to domain typos, which is direct revenue potential handed back to them,” Wasserman explains. “We surfaced about 46,000 serial complainers the client now factors into their sends even though they chose to keep them in the system. And we reclaimed database space against their record cap.”

For Wasserman, the biggest payoff was visibility.

“For the first time, the client could actually see the true condition of their list and make deliberate decisions about it, instead of guessing.”

Why one email list cleanup wasn't enough

Validating nearly 800,000 email addresses solved an immediate problem, but it also exposed a longer-term one. No email database will stay clean on its own.

“The one-time cleanup made something obvious: bad data doesn’t arrive all at once; it enters record by record, at the point of capture, and it keeps coming,” Wasserman says.

That realization changed SR Pro’s approach. “A single pass caught 128,000 issues. If we did nothing else, the same debt would simply rebuild over the next year.”

Rather than waiting for another large cleanup to become necessary, SR Pro helped the client establish email validation at the point of capture.

How SR Pro built ZeroBounce into the client’s workflow

SR Pro built an automated workflow that validates every new email address as soon as it enters the client’s system.

“We built an automation that sends every new record with an email address to ZeroBounce for validation the moment it enters the system, and populates a set of fields so the client can make smart routing and sending decisions automatically,” Wasserman explains.

Instead of allowing questionable email data to accumulate and dealing with it later, the client can now evaluate email addresses as they enter the system.

“What it changes going forward is simple: their list stays clean by default, their sender reputation is protected, and they never have to run a massive emergency cleanup again.”

Not every bad email is a lost contact

SR Pro began with a fundamental question: how much of its client’s email data could be trusted?

ZeroBounce gave the team the visibility to answer that question and helped recover email addresses that might otherwise have been discarded.

But the project also changed how SR Pro’s client manages email data going forward.

Instead of waiting for questionable data to pile up, the company now validates new email addresses as they enter the system, helping keep the database cleaner and giving the team better information to work with from the start.