![[Image: Speed-SMTP-Scanner-v2.5.png]](https://blackhattool.com/wp-content/uploads/2025/07/Speed-SMTP-Scanner-v2.5.png)
What is Speed SMTP Scanner v2.5 Registered?Speed SMTP Scanner v2.5 Registered is a penetration testing and reconnaissance tool designed to scan large ranges of IP addresses for SMTP servers (usually on ports 25, 465, 587). It checks for:
- Open relays that can be abused by spammers
- Misconfigured servers allowing unauthenticated access
- SMTP service banners revealing software versions
Servers vulnerable to common SMTP-related exploits
Key Features of Speed SMTP Scanner v2.5 Registered1. Ultra-Fast Multi-Threaded Scanning
- Utilizes multi-threaded architecture to scan thousands of IPs per minute.
- Configurable thread count to balance speed with system resource usage.
- Efficient socket handling reduces timeouts and improves throughput.
- Scans for commonly used SMTP ports:
- Port 25 (Standard SMTP)
- Port 465 (SMTPS – SMTP over SSL)
- Port 587 (SMTP with STARTTLS)
- Supports user-defined ports for non-standard setups.
- Tests servers to identify whether they allow unauthenticated users to send emails (open relay).
- Prevents spam abuse and blacklist risks.
- Highlights risky configurations that should be closed immediately.
- Retrieves SMTP service banners to fingerprint mail server types (Postfix, Exim, Sendmail, Microsoft Exchange, etc.).
Helps identify outdated or vulnerable SMTP software versions.
- Includes optional keyword matching to flag specific versions or products.
- Saves scan results in TXT, CSV, or custom formats.
- Filters available to only display open or vulnerable servers.
- Ideal for reporting, audit documentation, and further exploitation tools.
- Supports SOCKS4/5 and HTTP proxies for anonymized scanning.
- Tor integration available for added stealth.
- Helps bypass rate-limiting or IP-based firewall restrictions.
- Can be configured to send an alert or log when:
- Open relays are detected
- Certain banner strings are matched (e.g., “Exchange 2010”)
- Open relays are detected
- Useful for automated monitoring or alert-driven assessments.
- Allows sending custom HELO, MAIL FROM, and RCPT TO payloads.
- Useful for detecting how SMTP servers respond to fuzzed or malformed requests.
- Ideal for red teams looking to simulate advanced phishing methods or SMTP fuzzing.