Every invalid send damages your sender reputation. Listclean removes the risk before it costs you.
No setup. No learning curve. Upload, verify, download. Your list comes back clean with every column and field preserved exactly as uploaded.
Drop a CSV or TXT file up to 500K rows. All columns, names, tags, and custom fields are preserved throughout.
Syntax, MX records, SMTP handshake, catch-all detection, disposable filters, spam trap detection and AI scoring in under 2 seconds per address.
Export only the addresses you want to keep. Full status breakdown included. Your data is permanently deleted from our servers after download.
Bounce rates above 2% trigger ESPs to route your mail to spam or block you entirely. Every invalid send chips away at the deliverability you have spent months building.
High bounce rates trigger inbox providers to route your campaigns to spam or block your domain entirely.
bounce threshold before ESPs take action
Spam traps hidden in old lists can blacklist your domain overnight, affecting every campaign you send.
of any email list decays every single year
You pay to send to addresses that will never convert. Clean lists cut costs and lift ROI from the very first campaign.
higher open rates on verified clean lists
ListClean combines multi-layer checks to reduce bounces, protect sender reputation, and keep your lists clean—built for speed, accuracy, and scale.
Identify and suppress known and probable spam-trap signals before you send to protect deliverability.
Read more →Syntactic, domain, and mailbox existence checks reduce hard bounces and keep reputation intact.
Read more →Shield campaigns from users who frequently mark messages as spam and trigger filters.
Read more →We down-rank domains tied to bot signups, spam farms, and known abuse ecosystems.
Read more →Catch typos, bad characters, and malformed addresses before they enter your CRM.
Read more →Block short-lived aliases commonly used for sign-ups without intent to engage.
Read more →Reduce complaints by suppressing shared mailboxes with low engagement signals.
Read more →Distinguish likely-valid mailboxes from blanket accept-all responses using probabilistic signals.
Read more →Validate routing readiness with MX lookups, rDNS, and real-time SMTP dialogues where permissible.
Read more →Up to 90% faster than complex domains with ListClean’s optimized email verification pipeline.
Robust, multi-layer email verification for lesser-known domains, catch-alls, and stricter servers.
We give less popular domains a thorough examination, so you’re never stuck with “unknown” results. Times are estimates based on typical ListClean email verification runs.
Protect your sender reputation. Reduce bounces. Boost deliverability.
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