The larger your site, the more likely it is that you will need to use SMTP AUTH
as one more layer of email protection for your server. A mail gateway machine that is
a frontend for many PC and laptop machines is one situation where such trust is
desirable, and we will use it as an example later in this section.
In ?§5.1.5 on page 195, we show you how to set up sendmail as a client that connects
to a server that requires AUTH.*
5.1.1 Get and Install the SASL Library
As of this writing, the Cyrus SASL library is available from ftp://ftp.andrew.cmu.edu/
pub/cyrus-mail. But be sure you download and install the latest version. As of this
writing, version 2.1.22 is the latest, and is the one officially supported by V8.14 and
later sendmail. This is the version we document here and refer to as V2. The old
Cyrus SASL versions 1.y.z are referred to, collectively, as V1.
Note that you need to download and install Cyrus SASL whether you are using your
machine as a server or a client. The same library support is required for both roles.
After you have downloaded and extracted the source, first examine the file
INSTALL. It tells you how to build and install the library. The first step is to configure
the package for your machine:
# ./configure --help | more
This command shows all the ./configure command-line switches that you may
choose from.
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