+10.572 users
Simple, fast
, and secure
email validation service

Email Validation API: Clean Lists, Boost Deliverability & Maximize ROI.

Remove fake emails and spam users from your email lists.

GDPR Compliant
99.99% availability
Includes 50 free credits
No credit card required
Deliverable

This email address is valid

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Maria González

Maria González

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.

David Thompson

David Thompson

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.

Isabella Romano

Isabella Romano

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.

Alexandra Kim

Alexandra Kim

Finally found a service that actually delivers on its promise. Cleaned over 50,000 emails from our database and our reputation score has improved dramatically.

Michael Chen

Michael Chen

What sets them apart is their excellent customer support. Any questions I had were answered within hours. The validation accuracy is impressive too.

Laura Martinez

Laura Martinez

Been using it for 6 months now and it's prevented countless spam issues. The real-time validation feature is fantastic for our signup forms.

Maria González

Maria González

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.

David Thompson

David Thompson

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.

Isabella Romano

Isabella Romano

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.

Alexandra Kim

Alexandra Kim

Finally found a service that actually delivers on its promise. Cleaned over 50,000 emails from our database and our reputation score has improved dramatically.

Michael Chen

Michael Chen

What sets them apart is their excellent customer support. Any questions I had were answered within hours. The validation accuracy is impressive too.

Laura Martinez

Laura Martinez

Been using it for 6 months now and it's prevented countless spam issues. The real-time validation feature is fantastic for our signup forms.

Maria González

Maria González

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.

David Thompson

David Thompson

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.

Isabella Romano

Isabella Romano

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.

Alexandra Kim

Alexandra Kim

Finally found a service that actually delivers on its promise. Cleaned over 50,000 emails from our database and our reputation score has improved dramatically.

Michael Chen

Michael Chen

What sets them apart is their excellent customer support. Any questions I had were answered within hours. The validation accuracy is impressive too.

Laura Martinez

Laura Martinez

Been using it for 6 months now and it's prevented countless spam issues. The real-time validation feature is fantastic for our signup forms.

Crown

“Mails.so delivers all we need in an email validation service: top security, scalability, performance, and extensive integrations”.

AvatarA happy customer, probably

What does mails.so exactly do?

tl;dr — Remove invalid recipients, block fake users and bots, prevent fraud, and help you save money.

Format check
Delivery check
Email profiling
Blocklists
No-code APIs
Mailing lists

Place us after your sign up forms and landing pages.
We'll make sure you only get real users.

2-3% of users make spelling mistakes
3-4% make up their address on signup
~2% are spam signups with fake addresses
~1% use temporary or catch-all addresses

Use cases for mails.so

If you're running a newsletter, an e-commerce, a SaaS, or marketing campaigns, mails.so is for you.

Email marketing

Protect you from emailing non-existent addresses, which can increase your bounce rate and damage your reputation.

Bounce rate

Bot signups

Detect invalid addresses before they register, prevent spam and fake users and keep a high quality user database.

Bot signups

Fraud prevention

Detect disposable email addresses, catch users trying to use multiple accounts and prevent fraud before they can do any harm.

Fraud detection
Crown

“Mails.so delivers all we need in an email validation service: top security, scalability, performance, and extensive integrations”.

AvatarAnother happy customer, maybe

Integrations

No-code integrations with your favourite tools

We've built simple integrations with the most famous no-code tools. Start building today with🧡 Zapier or 💜 Make.

Get started
Reliability

Up and running now, then, and always

We know how important it is to have a reliable service. That's why we've built a rock solid service that has been running with a 99.9% uptime consistently.

Start for free
Service status
Operational
mails.so100.00% uptime
API99.993% uptime

Get started with 85% off your first month

All paid plans include API access and list validation.
Need extra validations? No problem. We've got you covered.

Enterprise

$1,899
per user
per month
  • Enable list validation
  • Unlimited validations
  • 99.99% Guaranteed Uptime SLA
  • Priority support

Unlimited

$249$37.35
per user
per month
  • Enable list validation
  • Unlimited validations
Most popular

Business

$49$7.35
per user
per month
  • Enable list validation
  • 50,000 validations per month included
  • $0.002 per extra validation

Pro

$24$3.60
per user
per month
  • Enable list validation
  • 10,000 validations per month included
  • $0.005 per extra validation

Frequently Asked Questions

Can’t find the answer you’re looking for? Don’t hesitate to get in touch with our customer support team.