Hard bounces
Undeliverable addresses signal mailbox providers and can push campaigns toward the spam folder.
List quality · spam risk
Reduce spam-folder risk by verifying first
Bad addresses drive hard bounces and dead engagement — two signals mailbox providers notice. ValidReach classifies addresses before you send so campaigns start cleaner.
Address quality before sendUnknown never burns creditsUI · lists · API same model100 free starter credits
What drives risk
Address quality is deliverability infrastructure
Content and authentication matter — but so does who you send to. Start with reachable mailboxes.
Disposable & risky rows
Temporary and low-quality inboxes rarely engage — and often die after capture.
Stale lists
Contacts decay. Re-verify before major sends so you are not warming traps with dead mail.
Weak capture
Typos and fake entries at the form become tomorrow’s bounce and complaint problems.
Playbook
Verify at capture. Clean before send.
A simple loop marketers and growth teams can run without inventing a second data model.
Gate capture
Verify on signup and lead forms so bad addresses never enter the ESP.
Clean before campaigns
Run list jobs, export deliverable segments, and handle risky rows with policy.
One result language
Share deliverable / risky / undeliverable / unknown across marketing and product.
Frequently asked questions
Cleaner lists. Fewer surprises.
Verify addresses before reputation takes the hit
Start free. Same results in the dashboard, list jobs, and API.