PowerMTA is described as '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' and is an app in the Office & Productivity category. There are more than 10 alternatives to PowerMTA for a variety of platforms, including Linux, Mac, Windows, the Web and Self-Hosted solutions. The best alternative is Zentyal. It's not free, so if you're looking for a free alternative, you could try Postfix or Zimbra Collaboration Suite. Other great apps like PowerMTA are hMail Server (Free, Open Source), Microsoft Exchange Server (Paid), Exim (Free, Open Source) and Sendmail (Free, Open Source).
- Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. View 42 alternatives to Zimbra Collaboration Suite
- Freemium • Open Source
- MailerQ is a high performance Mail Transfer Agent (MTA) and a very fast SMTP server, designed to deliver large volumes of email messages at very high speeds. MailerQ is based on RabbitMQ AMQP. View 7 alternatives to MailerQ
Cheaper licensing costs, less hardware required, faster, more scalable, better inclusive management console, friendlier to customersFaster, needs less resources (lower TCO), more flexibleBecause MailerQ offers a perpetual license now
- Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for commercial use. View 42 alternatives to iMail