dc.gov
# Staff ?†? a comment
ben
steve
#1user ?†? an address
* Th esendmail program also performs this check for critical system files, such as its configuration file.
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
13.2 :include: Mailing Lists | 489
Note that because comments and empty lines are ignored by sendmail, they can be
used to create attractive, well-documented mailing lists.
Under older versions of sendmail, comments can be emulated through the use of
RFC-style comments:
( comment )
By surrounding the comment in parentheses, you cause sendmail to view it (and the
parentheses) as an RFC-style comment and, thus, to ignore it:
( Management )
frida
george@wash.dc.gov
( Staff )
ben
steve
This form of comment works with both the old and new sendmail programs.
13.2.2 Trade-offs
As has been noted, the aliases file should be writable only by root for security reasons.
Therefore, ordinary users, such as nonprivileged department heads, cannot use
the aliases file to create and manage mailing lists. Fortunately, :include: files allow
ordinary users (or groups of users) to maintain mailing lists. This offloads a great
deal of work from the system administrator, who would otherwise have to manage
these lists, and gives users a sense of participation in the system.
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