Courier-MTA favicon

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. Certain portions of the Courier mail server - the mail filtering engine, the webmail server and the IMAP server - are also available as separate, smaller, packages that can be used with other mail servers.

Hectane

Hectane

An SMTP client that is extremely easy to configure and use, providing a simple HTTP API that is used for sending emails.

sSMTP

sSMTP

SSMTP is a program which delivers email from a local computer to a configured mailhost (mailhub). It is not a mail server (lik ...

Sendmail

Sendmail

Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, i ...

Exim

Exim

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

OpenSMTPD

OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard exte ...