MailboxValidator provides real-time email validation to help you maintain a clean email list and improve deliverability. With Relevance AI, you can leverage this validation to power your AI-driven workflows and enhance your email marketing efforts.



MailboxValidator ensures that your email addresses are valid and deliverable, while Relevance AI enhances this capability with intelligent AI Agents that can automate and optimize your email outreach strategies.
Email Intelligence Mastery
The AI agent gains real-time validation capabilities to instantly assess email authenticity and quality across all interactions.
Proactive Risk Prevention
Empowers the agent to identify and filter out disposable emails and potential spam traps before they impact sender reputation.
Deliverability Enhancement
The agent can predict and optimize email delivery success through advanced domain health checking and validation.
Relevance AI seamlessly integrates MailboxValidator into your workflows, enabling efficient email validation processes.
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 MailboxValidator account
- A Relevance AI account with access to your workspace and datasets
- API keys from both services (you'll need to authenticate securely—no sensitive info stored manually)
Security & Reliability
The MailboxValidator integration uses secure OAuth authentication, ensuring only authorized workflows access your email validation capabilities. Relevance AI handles API operations (like GET, POST) in the background—so you don’t have to worry about errors, formatting, or limits.
With real-time email validation, you can reduce bounce rates and improve sender reputation effortlessly. Built-in validation and comprehensive response handling ensure your workflows run smoothly, even when email formats vary.
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 MailboxValidator + Relevance AI integration without writing code:
- Start with valid email formats: Ensure email addresses conform to RFC 5322 standards to avoid validation errors.
- Use real-time validation: Implement email validation in workflows to catch invalid addresses before they cause issues.
- Connect carefully: Verify your MailboxValidator account and OAuth credentials during setup to ensure seamless integration.
- Test with sample data: Validate a few email addresses first to confirm the integration works as expected before scaling up.
- Monitor API usage: Be aware of rate limits and implement batch processing to optimize validation requests and avoid throttling.