Email Sleuth
Email Sleuth is a free, MIT-licensed Rust application for discovering and verifying professional email addresses from a contact’s name and company domain.
What Email Sleuth is
Email Sleuth is a free, MIT-licensed Rust application for discovering and verifying professional email addresses from a contact’s name and company domain. A single lookup accepts one person and domain, while batch mode reads JSON contacts with first name, last name, and domain fields and can write results to a JSON file. Basic, enhanced, and comprehensive modes combine DNS and SMTP checks; enhanced adds API checks, and comprehensive adds a headless browser. Results may include a best-guess address, confidence score, candidate addresses, verification status, methods used, and a verification log. The tool can generate plausible candidates and scrape company websites for addresses. It runs on Linux, macOS, and Windows, with a unified installer and manual binary downloads. SMTP verification needs outbound port 25 access, which many ISPs block. For blocked access, the README suggests enhanced or comprehensive modes, a cloud server, or a VPN permitting port 25 traffic.
Good
- Free and open source under the MIT license
- Supports single lookups and JSON batch processing
- Provides three verification modes
- Outputs confidence and verification details
- Runs on Linux, macOS, and Windows
Watch out
- SMTP checks require outbound port 25 access
- Many ISPs block the required SMTP port
- API providers are not specifically named
- No formal support commitment is stated
Who it suits
Email Sleuth suits users handling business-contact enrichment, cold email, lead generation, or email verification from names and domains.
Verdict
Email Sleuth offers flexible command-line discovery and verification with batch output and multiple checking modes. SMTP restrictions may require an alternate mode, server, or VPN for some networks.
The facts
Each one read from Email Sleuth's own pages, with the date it was checked.
What it does
- Batch processing
- Batch mode accepts a JSON array of contacts with first name, last name, and domain fields.checked 11 Oct 2001
- Email discovery
- It can generate plausible email candidates and scrape company websites for addresses.checked 11 Oct 2001
- Installation
- The maker provides a setup script, manual binary downloads, and instructions to build from source; the README describes Windows, macOS, and Linux binaries.checked 11 Oct 2001
- Integrations
- The README mentions API-based checks but does not name specific API providers or integrations.checked 11 Oct 2001
- Intended use
- Repository topics include cold email, contact enrichment, email verification, lead generation, and open source.checked 4 Oct 2001
- Intended users
- The README describes finding valid email addresses for business contacts when the user knows the contact’s name and company domain.checked 11 Oct 2001
- License
- The repository lists an MIT License.checked 11 Oct 2001
- Lookup
- A single-contact lookup takes a person’s name and a company domain.checked 4 Oct 2001
- Network requirement
- SMTP verification requires outbound access to port 25, which the README says many ISPs block.checked 11 Oct 2001
- Output options
- The CLI can print a simplified summary or save detailed results to a JSON file.checked 11 Oct 2001
- Purpose
- Email Sleuth is a Rust application that discovers and verifies professional email addresses from contact names and company domains.checked 11 Oct 2001
- Results
- Results can include candidate addresses, confidence scores, verification status, methods used, and verification logs.checked 11 Oct 2001
- SMTP requirement
- SMTP verification requires outbound access to port 25, which the README says many ISPs block.checked 4 Oct 2001
- Support
- The repository provides an Issues page for questions and reports; the README does not state a support service or response commitment.checked 11 Oct 2001
- Verification methods
- Its three modes use DNS and SMTP, add API checks in enhanced mode, and add a headless browser in comprehensive mode.checked 4 Oct 2001
- Verification modes
- It offers basic, enhanced, and comprehensive verification modes using combinations of DNS, SMTP, API checks, and a headless browser.checked 11 Oct 2001
- Workarounds
- For blocked SMTP access, the README suggests enhanced or comprehensive modes, a cloud server, or a VPN that allows port 25 traffic.checked 11 Oct 2001
Where it runs
- Browser verification
- The installer can install ChromeDriver for enhanced verification, and the README describes managing its service from the CLI.checked 11 Oct 2001
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