msmtp VS mailsend-go

msmtp is an SMTP client.

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

Lightweight
msmtp is a simple and lightweight SMTP client, making it easy to install and use without adding unnecessary overhead.
Configurable
It offers extensive configuration options, allowing users to tailor its behavior to their specific needs and integrate with various mail systems.
Scriptable
Being script-friendly, msmtp can be easily integrated into scripts and automated workflows for sending emails programmatically.
SMTP Server Support
msmtp supports numerous SMTP features, including authentication methods, ensuring compatibility with various mail servers.
Log Support
Provides detailed logging capabilities, which can help troubleshoot and monitor email sending activities.

Lacks Advanced Features
Unlike full-featured email clients, msmtp doesn't offer advanced features like a user interface or mail retrieval capabilities.
Requires Configuration
It requires manual configuration through text files, which might be cumbersome for non-technical users.
No Email Management
msmtp is only an SMTP client and doesn't handle email management tasks such as organizing or archiving emails.
Limited Documentation
While it has some documentation, users might find it insufficient or difficult to understand if they encounter complex configuration issues.

Cross-Platform Support
mailsend-go is developed in Go, which allows it to run on various operating systems like Windows, macOS, and Linux without needing platform-specific modifications.
Simple Command-Line Interface
The tool provides a straightforward command-line interface, making it easy to send emails directly from the terminal without needing to open an email client.
Support for Multiple Protocols
mailsend-go supports both SMTP and SMTPS protocols, allowing users to send emails securely over encrypted connections.
Attachment Support
Users can easily send emails with attachments, enabling more versatile email sending capabilities, such as sharing files and documents.
Open Source and Free
Being an open-source project, mailsend-go is free to use, modify, and distribute, encouraging user contributions and community support.

Limited Features
Compared to fully-featured email clients or more comprehensive email libraries, mailsend-go offers a limited set of features focused solely on email sending.
Requires Command-Line Knowledge
Users need to be familiar with command-line operations to effectively use mailsend-go, which might be challenging for non-technical users.
Lack of a GUI
The absence of a graphical user interface makes the tool less accessible for users who prefer interacting with software through a visual interface.
Dependency on an SMTP Server
Users must have access to a working SMTP server to send emails, which may require additional configuration and knowledge of SMTP settings.