sendemail

Lightweight, command line SMTP email client

Platforms: Linux · Last verified September 6, 2026

SendEmail is a lightweight, completely command line based, SMTP email agent. It was designed to be used in bash scripts, Perl programs, and web sites, but it is also quite useful in many other contexts.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

See the official Kali tool page and upstream homepage linked above for installation and usage details.

Commonly preinstalled on

Kali Linux

Debian-based distribution built for penetration testing and security auditing