Best STARTTLS Products

CMail is a free Windows command line mailer with advanced message formatting options.

Key CMail features:

User Interface Security Features Integration Customization

free

Real-time, open-time content for email: countdown timers, dynamic images, live product picks, geo-targeted maps, one-click surveys, and scratch-card rewards. No code, no ESP integration, rendered fresh every time someone opens.

Key Alterable features:

Countdown Timers Dynamic Images Dynamic Products Local Maps

Visit website freemium

Blat is a small, efficent SMTP command line mailer for Windows.

Key blat features:

Lightweight Software Command Line Based Free and Open Source SMTP Integration

mailsend-go is a command line tool to send mail via SMTP protocol, written with golang.

Key mailsend-go features:

Cross-Platform Support Simple Command-Line Interface Support for Multiple Protocols Attachment Support

CheFSendeR is a simple command line tool to send emails.

Key CheFSender features:

User-Friendly Interface Automation Features Integration Customer Support

free

Free utility to send emails from the command line. No Installation. All contained in one file.

Key Mailer features:

Scalability Security Customization Support

Open Source

msmtp is an SMTP client.

Key msmtp features:

Lightweight Configurable Scriptable SMTP Server Support

sendEmail is a lightweight, command line SMTP email client.

Key sendEmail features:

Ease of Use Lightweight Cross-Platform Support Support for Multiple Protocols

Open Source