Postfix is described as 'mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure' and is an app in the Online Services category. There are more than 10 alternatives to Postfix for a variety of platforms, including Linux, Mac, Windows, Self-Hosted solutions and BSD. The best alternative is Mail-in-a-box, which is both free and Open Source. Other great apps like Postfix are MailHog (Free, Open Source), Exim (Free, Open Source), OpenSMTPD (Free, Open Source) and msmtp (Free, Open Source).
- sSMTP is a simple MTA to deliver mail from a computer to a mail server. sSMTP is simple and lightweight, there are no daemons or anything hogging up CPU; Just sSMTP. Unlike Exim4, sSMTP does not receive mail, expand aliases, or manage a queue. View 19 alternatives to sSMTPNo screenshots yet
- Free • Open Source
- Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and DKIM) to comply with changing ISP policies for accountable outbound email delivery. No over hype. It just delivers. View 21 alternatives to PowerMTA
- Paid • Proprietary