smtp-client topic
mailman
Web email client supporting HTML template and SMTP
Blat
:e-mail: Blat is a command line email tool (sending mail via smtp), written for Windows.
drymail
Makes sending emails easy and DRY — For Python 3.
go-simple-mail
Golang package for send email. Support keep alive connection, TLS and SSL. Easy for bulk SMTP.
Mailpile
A free & open modern, fast email client with user-friendly encryption and privacy features
ansible-postfix
Ansible role to set up postfix in Debian-like systems
aiosmtplib
asyncio smtplib implementation
MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP.
notqmail
The collaborative Open Source successor to qmail and netqmail