Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Sendmail - Sendmail is a general purpose internetwork email routing facility that supports many kinds of...
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.