reacherhq/check-if-email-exists
Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.
About the project
A Rust tool that checks whether an email address exists without sending any email: validates syntax, MX records, SMTP, disposable addresses and breaches. Available as a CLI, Docker HTTP backend and Rust library.
Useful for
- Validate signup form email addresses before sending a newsletter
- Run the Docker HTTP backend and call it from your own service
- Filter out disposable and role accounts when accepting signups
README summarized by DeepSeek V4.1 Flash. Details may be inaccurate.
Why it’s trending
- 43 stars today. The usual pace is 7 per day, so that's 6× as much.
- Over the last two days the pace is 14× that of the previous week and a half.
- The spike has held for 2 days in a row — not a one-off blip.
- GitHub Trending Rust today: #8, +110 stars.
Stars per day
Bars are daily stars, the line is the usual pace. Red marks spike days.
Numbers
- Total stars
- 9,794
- Stars in a day
- 44
- Forks
- 707
- Issues and pull requests
- 1,626
- Watchers
- 66
- Language
- Rust
- Latest release
- v0.11.7 · January 15, 2026
- Created
- April 25, 2017
- Last push
- March 17, 2026
Star trust
Growth looks organic: forks and discussion are in line with active projects, and stars arrive unevenly, the way people give them.
These are heuristics, not a verdict: we judge by the repository’s behavior, not by a list of stargazers.
Spotted in
- September 13, 2026GitHub Trending Rust today: #8, +110 stars
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README badge
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