courier-base - 1.3.13-11+b1 main

The Courier mail transfer agent (MTA) is an integrated mail/groupware
server based on open commodity protocols, such as ESMTP, IMAP, POP3,
LDAP, TLS, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and
mailing list services within a single, consistent, framework.
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This package provides the functionality needed by all courier
packages such as some configuration files, helper programs and the
Courier TCP server daemon.
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Courier uses the a TLS wrapper application named couriertls
instead of embedding TLS support in the different applications.
Additionally, this package contains a default set of trusted X.509
root CA certs.