mails.so
mails.so — Unbeatably simple email validation
mails.so launched on October 13, 2024 with 9 votes, #1,236 of 5,185 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 2 years on.
What it does
Check if an email address is valid for free. Prevent fraud, dodge fake users, and preserve your sender reputation.
The recipient's email server has confirmed its deliverability. I've been using the service for our email validation and it's been incredibly reliable . The interface is intuitive, and we've seen improved delivery rates by 40% since we started using it. Very quick and easy to configure. Took less than 5 minutes to set up and start validating emails. Exactly what I needed without the complexity of other services. The API integrates seamlessly with our platform. It accurately identifies invalid emails , helping us maintain a clean, active list. Our engagement rates have improved significantly. Finally found a service that actually delivers on its promise. Cleaned over 50,000 emails from our…from mails.so
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