626 Part V . Running Servers 11. Install
626 Part V . Running Servers 11. Install and start Qpopper if you want to provide POP3 access: # apt-get install qpopper If desired, you can also enable IMAP support by installing uw-imapd package. 12. If any client machines are going to be relaying messages through your server, add their IP addresses to /etc/mail/access and run make in the /etc/mail directory to update the database. This change does not require that you reload the sendmail configuration. The default /etc/mail/access file contains REJECT settings for a number of IP address blocks. These addresses are not assigned to any networks right now but are sometimes abused by spammers. From time to time, one of these address blocks is assigned to a regional IP address registry and then further divided among networks. When this happens, your server will continue to reject mail from those addresses. You can find a list of these networks at http://cymru.com/Bogons/ index.html. If you don t have time to check the list regularly for removals, then you may want to remove the entries now. You now have a fully functioning mail server that you can access from any standard mail client. Installing and Running Postfix Postfix (http://postfix.org/) was created by Wietse Venema as a replacement for sendmail. It was designed to be fast, easy to administer, and secure. It was also designed to behave similarly enough to sendmail that existing users would be able to switch without needing to make any major changes to other programs. Maildrop (http://flounder.net/~mrsam/maildrop/) is the local MDA for the Courier mail system and is also available as a standalone package. It can be configured to sort messages based on rules that are specified on a system-wide or per-user level and is used in this example configuration to run messages through SpamAssassin and ClamAV and then move them to a Trash folder if either filter identifies them as undesirable. Courier-IMAP (http://courier-mta.org/imap/), like maildrop, is a part of the Courier mail system and is also available as a separate package. Follow these steps to install and configure the needed software: 1. Install the Postfix and maildrop packages: # apt-get install postfix postfix-doc maildrop Caution Note
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