So,
to make sendmail more adaptable, the $=s class was added beginning withV8.7. This class
contains a list of subtypes that should be treated the same as rfc822. When sendmail first
begins to run, it initializes that list to contain:
rfc822
Other subtypes that can legitimately appear here might be partial or delivery-status.
Note that this provides only an initial hint to sendmail. Th erfc822 subtype can itself
contain MIME information that might require 8- to 7-bit encoding.
22.6.15 $=t
List trusted users V8.7 and later
Trusted users are those who can run sendmail withth e -f command-line switchto specify
who sent the message, without generating a warning. Prior to V8.6 sendmail, suchusers
had to be listed with the T command (?§4.8.1.1 on page 174). That command was ignored
in V8.1 through V8.6, and with those versions anyone could use the -f switch. Beginning
withV8.7 sendmail, th eT command was reintroduced, but it now causes the list of trusted
users to be added to the class $=t. Now, any user who uses the -f switchand who is not
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Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
876 | Chapter 22: The C and F (Class Macro) Configuration Commands
listed in class $=t will cause the following error message (?§25.12.40 on page 1167) to be
included in the outgoing mail message (if the PrivacyOptions option, ?§24.
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