PowerMTA

PowerMTA is an industrial-strength software for high-volume email delivery.

17 Alternatives To PowerMTA

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Courier-MTA

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open…

EmailSuccess

EmailSuccess is an advanced MTA built to handle the most critical reliability, performance, security, and deliverability requirements.

Exim

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

Mail-in-a-box

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
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MailChimp

MailChimp is the best way to design, send, and share email newsletters.
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MailEnable

MailEnable is a Windows based mail server and email server program that is packed with the state of the features and functions like antivirus and spam filtering system, webmail management system, cardDAV, CalDAV and much more.
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Mailgun

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Microsoft Exchange Server

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

Microsoft SMTP Server

Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site.

OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with…

SMTP2GO

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

SendInBlue

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.

Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP.

Zimbra Collaboration Suite

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).

msmtp

msmtp is an SMTP client.
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turboSMTP

turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all…