Postfix Alternatives [Page 4]

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

Mutt is a small but very powerful text-based mail client for Unix operating systems.

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

GreenArrow Transactional Email provides a flexible and secure SMTP and API email delivery from application or website.

Modernize your mail server

Open Source free

NikaMail is a portable, extendable, zero-config email server.

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

The Courier IMAP server is a fast, scalable, enterprise IMAP server that uses Maildirs.

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

freemium $1.0 / Monthly (per user)

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.

SMTP provides scalable affordable email infrastructure for all your sending needs.

Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online

Google's encompassing suite of cloud-based business apps.

Is a collaboration suite (messaging and groupware).