Disk
space requirements depend mostly on how much mail you want to have room for, so plan on having
a few gigabytes for the operating system (which will leave you plenty of extra, just in case), plus
the amount of mail you want to store.
673
Running a Mail Server 25
The operating system should be installed with only the basic set of packages before you begin these
examples. Some general information about the installation is provided in Chapter 9. Although the
software described in this chapter works even if you aren??™t running Debian, the installation methods
will not. If you don??™t have a spare system to act as a dedicated mail server, you can still use it as
your workstation, although this is obviously recommended only for personal use.
Your network settings should also be properly configured before you begin installing the mail software.
The exact requirements depend on the method by which mail will be delivered to your server:
Direct delivery is the method used by most traditional mail servers. DNS records tell
remote servers that any mail addressed to your domain should be sent to your server
via SMTP.
Retrieval from a mail host is also possible using an MRA (mail retrieval agent) such as
Fetchmail. This option can be used when you have a mailbox under a shared domain but
want to access the mail on your own server.
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