Our guarantee: 99.5% accuracy + ≤3% bounce rate on Safe

Let's be real for a second. You are trusting us with your email list. Your contacts. Your sender reputation. Your marketing budget.

That is not something we take lightly. So here is what we promise — in plain English, no fine print, no weasel words.

99.5% verification accuracy

Our email verification engine delivers 99.5% accuracy on every list you verify.

What does that mean in practice? When we tell you an email is Safe, you can trust it. When we tell you an email is Invalid, it is not going to magically start working. When we flag something as Risky or Disposable, there is a real reason behind it.

We hit this number through the 9-step verification process — syntax, domain, MX records, SMTP, catch-all, disposable, spam trap, role-account detection, and additional checks. Every email runs through these before you get results. No shortcuts. No guessing.

That is how we maintain 99.5% across millions of verifications.

3% maximum bounce rate guarantee

Here is where we put our money where our mouth is.

We guarantee that no more than 3% of emails marked as Safe will bounce when you send to them. Not a target. Not an aspiration. A guarantee.

How it works

1. You verify your list with Valid Email Checker
2. You send only to emails we marked as Safe
3. You track your bounce rate

If your bounce rate on Safe emails exceeds 3%, we refund the difference in credits.

Example

Say you verify 10,000 emails. 7,000 come back Safe. You send to those 7,000 and get a 4% bounce rate (280 bounces). The agreed maximum was 3% (210 bounces). The difference is 70 bounces over the guaranteed threshold. We refund 70 credits to your account.

This is not theoretical. It is a real product commitment that ties our revenue to your results.

Data security commitments

Beyond accuracy, there are commitments about how we handle your data.

15-day automatic data deletion

Your uploaded email lists are deleted from our systems 15 days after upload. Not "we might delete them eventually." Not "we keep them around but encrypted." Deleted. Automatically.

No emails sent to your contacts

Our verification is passive — SMTP handshakes and DNS lookups. Your contacts never see anything from us. Other services sometimes send actual test emails to verify, which can hurt your sender reputation. We never do.

No data sharing or selling

Your lists are yours. We do not sell them, share them, or use them for anything beyond the verification you asked for. Our business model is selling verifications, not selling data.

What this guarantee covers

The guarantee covers verification accuracy and our handling of your data. It does NOT cover bounces unrelated to email validity — for example:

• Sending content that triggers spam filters
• Sending from a domain with bad sender reputation
• Sending to verified-Safe addresses where the account was deactivated AFTER our verification
• Bounces from your ESP's own delivery infrastructure
• Content blocked by recipient mail providers for non-email-validity reasons

In other words: we guarantee that the addresses we mark Safe are real and deliverable at the time of verification. Once you send to them, deliverability also depends on your sending domain, content, and reputation — which are outside our scope.

How to claim a refund

If you believe your bounce rate exceeded the 3% threshold on a Safe-only campaign, email support@validemailchecker.com with:

• The verification task ID (visible in your dashboard)
• The campaign date and recipient count from your ESP
• A bounce report or export from your ESP showing the bounced addresses
• Confirmation that you only sent to Safe-tagged addresses

We review the data and apply the refund within a few business days. Credits go back into your PAYG bucket, where they never expire.

Why we offer this

Most verification services hide behind vague claims. "Up to 99% accuracy." "Best-in-class deliverability." Marketing language with no teeth.

We take a different approach. We commit to specific numbers and tie our credits to them. If we underperform, you do not pay for the underperformance. That is the contract.

It also keeps us honest. The bounce-rate guarantee means we have a direct financial incentive to keep our verification engine accurate over time — not just hit a number once and let it slip.

Next steps