Speed Smtp Scanner V2.5 | Free Download

All results are streamed to the GUI and saved to disk. The user can then use the resulting SMTP list for mass mailing (spam) or other purposes.

SMTP servers have evolved. Many modern servers use STARTTLS, greylisting, and rate limiting. Speed SMTP Scanner V2.5 is several years old and may produce false positives or miss modern protections entirely.

The scanner issues the following commands: Speed Smtp Scanner V2.5 Free Download

MAIL FROM: <test@example.com>
RCPT TO: <test@test.com>

If the server returns 250 OK or similar for RCPT TO to a domain that is not its own, the server is an open relay.

If you are a mail server administrator concerned about being targeted by users of this tool, here are proven countermeasures: All results are streamed to the GUI and saved to disk

Set up a fake SMTP server (e.g., using honeyd or T-Pot) that logs every connection. Submit scanner IPs to AbuseIPDB and your ISP.

While often associated with malicious activity, Speed SMTP Scanner V2.5 can be used legally and ethically in specific scenarios: SMTP servers have evolved

Critical Note: Scanning third-party IP addresses without explicit written permission violates computer fraud laws in most jurisdictions (CFAA in the US, Computer Misuse Act in the UK, similar laws globally). Even scanning entire IP ranges owned by your own ISP may violate their Terms of Service.