Traditional email verification requires sending an OTP, which costs money and often suffers from deliverability issues. The new reversal method flips this flow entirely. Instead of you sending to the user, the user sends an email to a unique address you provide, proving ownership through action.

This approach eliminates send costs and spam folder problems. Sendovate's API generates a verification email address and code. Users simply click to open their mail client and send any message. The service confirms receipt and notifies your app via webhook. It works with any email provider.

For broader security, Sendovate also offers email validation to block disposable addresses like GuerrillaMail. Developers can validate single emails or process batches up to 100,000 via CSV upload. Pricing is usage-based at 1 SVC per operation, with no monthly minimums, providing a flexible alternative to standard OTP systems.