Frequently Asked Questions

About Email Verification & Validation API

The advantages of checking and cleaning emails include increased deliverability, improved sender reputation, reduced bounce rates, and better email marketing campaign performance.

This leads to a more efficient and effective use of resources and improved customer communication.

The steps in a nutshell: 

  • Validating the syntax of the email address to guarantee its accuracy before continuing with the procedure.
  • Evaluating the configuration of the domain for email reception and determining the Email Service Provider responsible for email management.
  • Asking the Email Service Provider about the deliverability of the address.

The Mailsguide API has a 99.5%+ accuracy rate!

Yes, our API is capable of Bulk check, it can process up to 100 000 emails in one batch, but the recommended size is between 1000 to 10,000 email andresses. 

Read more about this on the Documentation page.

The API returns a numerical Quality Score that ranges from 0 (Poor) to 1 (Excellent), indicating the quality and deliverability of the requested email address.

1.00 – 0.75  Good

0.74 – 0.45   Medium

0.44 – 0  Bad

Please note, that Quality Score is only an indicator, and should not be the only decisive factor.

About Subscription

To get an API Acces Key you have to subscribe to one of our Pricing Plans. The first month of each plan is discounted, allowing developers to try the service before committing.
Have a look at our Pricing Plans
Payments can be made via Credit Card (Visa, MasterCard, American Express, Discover) or via Paypal.

No, Mailsguide plans are non-refundable. Please check the date on which your subscription renews and try to cancel it on time.

Read more about our Cancellation and Refund Policy.

You should send an email to support@mailsguide.com at least 7 days before the date on which your subscription renews.

Read more about our Cancellation and Refund Policy.

The system will automatically try to charge you every 3 days. If this fails multiple times, your API subscription may be automatically canceled without notice.

Scroll to Top