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Running Servers Part V
About the System and the Software Used
The mail server configuration described in this chapter is based on the Exim mail transfer agent.
Along with Exim, several other components are added for managing the server and checking
e-mail contents for spam and viruses:
Exim (www.exim.org/)??”An MTA written and designed by Philip Hazel at the
University of Cambridge, with contributions from many people around the world.
The version referred to in this chapter includes the Exiscan-ACL patch (http://
duncanthrax.net/exiscan-acl/) from Tom Kistner. This patch allows content
scanning from within Exim. Because this patch is integrated with Exim, its features
are considered part of Exim for the purposes of this chapter.
Maildrop (www.courier-mta.org/maildrop/)??”A local MDA that is part of the
Courier MTA package, but is also available as a standalone program. It is used in this configuration
to allow the use of advanced features, such as mailbox quotas and server-side
message sorting.
Courier IMAP and POP (www.courier-mta.org/imap/)??”Like Maildrop, these are
parts of the Courier MTA that are also available separately. They were chosen for their
easy installation, good performance, and compatibility with the Maildir-format mail
directories.
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