Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by its former names VMailer and IBM Secure Mailer.
Microsoft SMTP Server Alternatives
Microsoft SMTP Server is described as 'Configure SMTP e-mail in IIS when you want to deliver e-mail messages from your site. Mail can be delivered immediately or it can be delivered to a file location on disk where it can be retrieved for delivery later' and is an app in the office & productivity category. There are more than 10 alternatives to Microsoft SMTP Server for a variety of platforms, including Linux, Mac, Windows, BSD and Self-Hosted apps. The best Microsoft SMTP Server alternative is Postfix, which is both free and Open Source. Other great apps like Microsoft SMTP Server are Exim, OpenSMTPD, Sendmail and Courier-MTA.
Alternatives list
- 26 Postfix alternatives
Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange e-mails with other systems speaking the SMTP protocol.
Cost / License
- Free
- Open Source
Platforms
- Linux
- BSD
- Self-Hosted
26 Sendmail alternativesSendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework.
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.
A small Mail Transport Agent (MTA), designed for home and office use. Part of DragonFly BSD , it accepts mails from locally installed Mail User Agents (MUA) and delivers the mails either locally or to a remote destination.
Cost / License
- Free
- Open Source
Platforms
- Linux
- BSD
Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.
AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.
An SMTP client that is extremely easy to configure and use, providing a simple HTTP API that is used for sending emails.
Cost / License
- Free
- Proprietary
Platforms
- Windows
- Linux
BulkMTA is Commercial Mail Server Similar to PowerMTA. IP Rotation, DKIM, Sender / Receiver Rate limiting.
NikaMail is a portable, extendable, zero-config email server. It is designed to perform automation tasks, provide access to mailboxes (port 110), serve as a mail transfer agent (port 587) and mail exchange service (port 25). NikaMail supports TLS.
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