Drop in a CSV and ZipAudience instantly strips out invalid syntax, dead domains, disposable inboxes, and role addresses, so what’s left is worth sending to.
Valid
79%10,180
Risky
13%1,644
Invalid
8%1,016
Why addresses were flagged
A domain-and-pattern pass: no test emails are sent. Valid, risky, and invalid download as separate files.
The problem
Most lists are 10-30% junk: typos, abandoned domains, throwaway inboxes, and shared role addresses. Send to them and mailbox providers notice. Your bounce rate spikes, spam complaints climb, and your good emails start landing in spam, even for the contacts who genuinely wanted to hear from you.
The market gap
Standalone verification tools charge per check and live outside your workflow. You export, upload elsewhere, pay, re-import, then send. ZipAudience puts verification inside the same place you build and send, so a clean list is the default, not a chore.
How we solve it
The free verifier runs a fast, multi-signal pass over every address, with no per-email meter for the basics.
Catches typos and malformed addresses that bounce on contact.
Confirms the domain actually exists and can receive mail.
Flags throwaway inboxes that vanish in minutes.
Spots info@ / admin@ shared inboxes that rarely convert.
Removes duplicates so you never hit the same person twice.
Download valid / risky / invalid as separate ready-to-use files.
Verification is the first step in an AI-run pipeline. Save the clean list to your account and ZipAudience can profile the audience, draft the outreach, and follow up automatically, so a cleaned list flows straight into a campaign instead of sitting in a downloads folder.
How it works
Drop in a CSV, TSV, or text file of emails.
We run all checks server-side in one fast pass.
See valid, risky, and invalid broken out with reasons.
Download clean segments or save the list to reuse in campaigns.
Lower bounces keep you out of the spam folder for everyone.
Only email addresses that can actually receive it.
The core domain-level verification is free to run.
Saved lists drop straight into campaigns, with no re-export.
No. The free pass checks syntax, the domain’s mail records, disposable/role patterns, and duplicates, all without sending anything. For true mailbox-level confirmation, see our Mailbox Verification feature.
CSV, TSV, and plain text. We auto-detect the email column and ignore the rest.
Up to 25,000 addresses per file, with upload size scaling by plan. The syntax, disposable, and role checks run on every address; the domain mail-record (MX) check runs within a time budget, so on very large lists with many distinct domains some rows may come back with a format-level result rather than a full domain check. For mailbox-level certainty on any address, use Mailbox Verification.
They’re kept in their own segment with the reason flagged, so you decide whether to include catch-all or role addresses. We never silently drop them.
Verify your first list free. No credit card required.
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