List Validation

Stop wasting money on bad addresses and reputation damage to boot. List validation allows you to pre-check your lists and strip out invalid or questionable email addresses, minimizing risk to your reputation.

Don’t take SMTP responses at their word; get Verified Valid™, a higher degree of certainty informed by industry best practices and decades of experience at mailbox providers and ESPs.

Send to more. While others may not have the data to determine real risk, 250ok’s Verified Valid™ doesn’t only find more deliverable addresses, but more addresses demonstrating recent engagement activity signals.

In early benchmarks performed against market leaders (June 2019, 1M+ addresses sampled), 250ok discovered:

• In scanning "Unknown" (unmatchable) addresses, up to 75% were determined to be deliverable
• 99.5% of the addresses one vendor identified as “high risk” were actually Verified Vaild™
• On compliance checks, 250ok was up to 40% better at identifying undeliverable addresses than leading validation providers

When you get the 250ok platform, you not only benefit from market-leading email analytics, you benefit from consolidation. Consider 250ok for significant savings, because we only charge for each UNIQUE address, not total addresses.

Single address API? Check. Batch upload API? Check. Typo corrections? Check.

Plus, 250ok is SOC 2 Type II compliant, meaning we adhere to the highest and strictest standards of data protection, so you can rest assured we don’t play around.