SMTP Tool is a portable Windows desktop application for testing, diagnosing, and debugging SMTP servers. It supports TLS 1.3, real-time open/click tracking via local HTTP server, latency benchmarking, and interactive protocol terminal.
Developer toolsAutomationTesting & debugging
sendsmtp is a dependency-free command-line SMTP client written in pure Python. It builds a UTF-8 plain-text message from inline text, a file or stdin and delivers it to an SMTP server, with optional implicit TLS, STARTTLS, authentication, CC/BCC and verbose SMTP dialog output.
Developer toolsAutomationCLI & terminal