check-if-email-exists
A Rust tool to verify email address deliverability without sending emails, with CLI, HTTP backend, and library options.
What is check-if-email-exists?
Check-if-email-exists is a Rust-based tool that verifies whether an email address exists and is deliverable without sending any email. It performs multiple checks including syntax validation, DNS MX record lookup, SMTP server connection, and disposable email detection to determine email reachability. The tool helps reduce bounce rates and improve email list quality by identifying invalid or risky addresses upfront.
Developers, SaaS companies, and businesses that need to validate email addresses for user sign-ups, marketing campaigns, or data cleaning purposes. It's particularly useful for teams building applications with email-based authentication or communication features.
Unlike many paid email verification services, it's open-source, self-hostable, and respects privacy by not sending emails. It offers multiple integration options (CLI, HTTP API, Rust library) and provides detailed, actionable JSON output for each verification.
Overview
Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.
Use Cases
Best For
- Reducing email bounce rates in marketing campaigns
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