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Install the app, then continue on the free plan or enter your license key. The app keeps itself up to date.
Version 3.0.2, released Aug 17, 2026.
- Windows (64-bit)10.3 MBDownload for Windows (64-bit)SHA-2569abf8e0ddc2b…9e0fef
- macOS (Apple silicon)9.0 MBDownload for macOS (Apple silicon)SHA-256d9edd3ed3556…80a470
- macOS (Intel)9.9 MBDownload for macOS (Intel)SHA-256c9f57f45a8dd…d00fb1
- Linux (x64 AppImage)14.8 MBDownload for Linux (x64 AppImage)SHA-2567afd2326b2ba…4a36e1
What is new in 3.0.2
Fixed
- Upgrading from 3.0.0 keeps your history and settings.
- Faster start-up on Windows.
- The run pauses instead of marking addresses when your own internet connection drops.
Earlier versions (3)
3.0.0 · Jul 28, 2026
2.9.0 · Apr 9, 2026
2.8.4 · Jan 29, 2026
Requirements
- Windows (64-bit), macOS (Apple silicon or Intel) or Linux (x64).
- An internet connection for DNS lookups and, on paid plans, the probe server.
- No open port 25 needed on your network: paid mailbox checks run through the probe server.
Compare the SHA-256 checksum with the file you downloaded to make sure it arrived intact.