Sendmail!

* Companies that can afford and/or feel comfortable being outside Industry best practices Download http://sendmail.com/sm/open_source/download
Licensing http://sendmail.com/sm/open_source/download/licensing
Security http://sendmail.com/sm/open_source/security
Documentation http://sendmail.com/sm/open_source/docs
Tips and Tricks http://sendmail.com/sm/open_source/tips/

Sendmail alternatives

  • Zentyal

  • Zentyal is a native Microsoft Active Directory® implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure Server.

    tags: linux-operating-systems groupware mail-server email-hosting web-interface
  • Zimbra Collaboration Suite

  • Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.

    tags: calendar groupware mail-server
  • Courier-MTA

  • 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. Individual components can be customized, enabled or disabled at will.

    tags: imap smtp mail-server mailing-list mail-filter
  • Microsoft Exchange Server

  • Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions. Exchanges major features consist of electronic mail, calendaring, contacts and tasks; support for mobile and web-based access to information; and support for data storage.

    tags: chat-servers mail-server
  • sSMTP

  • SSMTP is a program which delivers email from a local computer to a configured mailhost (mailhub). It is not a mail server (like feature-rich mail server sendmail) and does not receive mail, expand aliases or manage a queue. One of its primary uses is for forwarding automated email (like system alerts) off your machine and to an external email address.

    tags: mta smtp
  • Dragonfly Mail Agent

  • 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. Remote delivery includes several features like TLS/SSL support and SMTP authentication. dma is not intended as a replacement for real, big MTAs like Sendmail or Postfix. Consequently, dma does not listen on port 25 for incoming connections. »

    tags: smtp email-transfer message-transfer-agent
  • OpenSMTPD

  • 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.

    tags: smtp smtp-server
  • Atmail Email Server

  • Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows.

    tags: address-book business-email email-client email-sending exchange-calendar-sync
  • BulkMTA

  • BulkMTA is Commercial Mail Server Similar to PowerMTA.IP Rotation, DKIM, Sender / Receiver Rate limiting

    tags: mail-server mailing-list mailer
  • msmtp

  • In the default mode, it transmits a mail to an SMTP server (for example at a free mail provider) which takes care of further delivery.To use this program with your mail user agent (MUA), create a configuration file with your mail account(s) and tell your MUA to call msmtp instead of /usr/sbin/sendmail.

    tags: mta network-utility network-xfce smtp
  • Microsoft SMTP Server

  • Available in Windows and Windows Server via the optional IIS role.

    tags: email-via-smtp exchange mail-smtp mta outbound-smtp
  • PowerMTA

  • PowerMTA is an “enterprise” grade infrastructure application for email built to address the challenges of critical digital messaging environments and customer communications. PowerMTA™ is (advanced smtp software) providing unsurpassed reliability and delivery execution, with granular connection controls. Offering superior message throughput, simplified set up and configuration, and visibility through real-time reporting and tracking, PowerMTA™ pays dividends immediately. It is built on advanced multi-threaded persistent architecture—for messaging breakthrough that delivers unsurpassed resilience and performance. »

    tags: smtp mail-server smtp-server mta email-gateway