Whether you run a Substack, a paid newsletter, or a community email list, every subscriber matters. Invalid or fake emails waste your time, hurt deliverability, and damage your sender reputation.
Confirm free and paid subscriber emails that other tools fail to verify.
Real-Time Results, No Emails Sent
Clean your lists instantly without sending test messages.
7-Step Verification Process
Includes SMTP, DNS, MX, pattern analysis, and more for the highest accuracy.
Built for Scale
Perfect for newsletters with thousands of signups per month.
Keep Every Edition Deliverable
Your growth depends on consistent inbox placement. A single bad list import can hurt engagement rates and put your domain at risk.
1B+
emails verified
99%
SMTP verification accuracy
99%
catch-all verification accuracy
Get Over 50% More Valid Subscribers
Generic verifiers discard catch-all addresses from workplaces, schools, and custom domains. Listmint verifies them in real time, helping you grow your newsletter audience without wasting signups.
Proof of Results: 84% Valid vs 55% Industry Average
Most email verification tools average 55% valid results, leaving nearly half of your audience behind. Listmint customers see up to 84% valid contacts, giving you a larger, more engaged reader base.
Real-Time API for Sign-Up Forms
Stop bad emails at the source by adding Listmint to your newsletter sign-up process. This ensures every new subscriber is valid before they ever hit your list.
Support, Dashboards, and Reporting
Monitor list quality over time with detailed dashboards. Get help from our support team to keep deliverability and engagement rates consistently high.
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