sendmail, 4th Edition

Before You Begin, a Checklist

Before you begin the process of building sendmail, you should consider obtaining and installing several important support packages. These packages are not needed to install sendmail, but they will make your system more convenient and safer. Typically, each takes 20 minutes to an hour to install, so you really are not facing a serious time commitment.

The packages we will discuss in this section are outlined in Table 3-1 and discussed in the sections that follow.

Table 3-1. Handy packages in support of sendmail

Package	§	Description
tcpwrappers	See ftp://ftp.porpine.org/pub/security/index.html.	Access control at the TCP level (V8.8 and earlier, not covered in this edition)
Sleepycat DB	The Sleepycat DB Library on page 104	For aliases and map files
Regex library	The regex Library on page 104	Use regular expressions in maps