Mails.so is an integration platform that offers email validation capabilities via a RESTful API, helping developers ensure email deliverability and minimize bounce rates. With Relevance AI, you can enhance this process by utilizing AI Agents to automate and refine your email validation strategies.



Mails.so provides robust email validation through a RESTful API, ensuring high deliverability rates. Relevance AI leverages this capability to empower AI Agents to intelligently manage and optimize your email communications.
Intelligent Email Orchestration
The AI Agent gains precise control over email delivery timing, routing, and personalization at enterprise scale
Predictive Engagement Optimization
Leverages real-time analytics to forecast and enhance email campaign performance through behavioral pattern analysis
Smart Audience Segmentation
Automatically categorizes and targets recipient groups based on sophisticated behavioral and demographic analysis
Relevance AI seamlessly integrates with Mails.so to enhance your email validation workflows.
What you’ll need
You don't need to be a developer to set up this integration. Follow this simple guide to get started:
- A Relevance AI account
- An Airtable account with access to the base and table you'd like to use
- Authorization (you'll connect securely using OAuth—no sensitive info stored manually)
Security & Reliability
The Mails.so integration utilizes a secure OAuth-based authentication system, ensuring that only authorized applications can validate email addresses through the API. Relevance AI manages all API operations (such as validating emails) seamlessly in the background, allowing developers to focus on their core functionalities without worrying about errors or formatting issues.
With real-time email validation capabilities, the integration guarantees that email addresses are checked for deliverability, significantly reducing bounce rates. The comprehensive validation results provide insights into the status of each email, ensuring that your workflows operate efficiently and effectively.
No training on your data
Your data remains private and is never utilized for model training purposes.
Security first
We never store anything we don’t need to. The inputs or outputs of your tools are never stored.

To get the most out of the Mails.so + Relevance AI integration without writing code:
- Start with valid email formats: Ensure that the email addresses you are validating conform to standard formats to avoid unnecessary errors.
- Utilize bulk validation: When validating multiple emails, use the bulk validation feature to optimize performance and reduce API calls.
- Monitor your API usage: Keep track of your API rate limits to avoid hitting the maximum request threshold and receiving 429 errors.
- Implement error handling: Always include error handling in your requests to gracefully manage any validation failures or authentication issues.
- Test with sample data: Before deploying your integration, validate a small set of emails to ensure everything is functioning as expected.