22.4 Internal Class Macros

Prior to V8 sendmail , only the class $=w was used internally, and only a small handful of classes were used in the configuration file. Recently, more and more classes have been added to that list. Table 22-3 lists all the class macros defined internally by sendmail as of V8.12.

Table 22-3. All the class macros defined internally by sendmail

Class	§	Description
$=b	$=b	MIME types for no NL-to-CRLF translation
$={checkMIMEFieldHeaders}	$={checkMIMEFieldHeaders}	MIME headers for maximum parameter length checking
$={checkMIMEHeaders}	$={checkMIMEHeaders}	MIME headers for maximum legal length checking
$={checkMIMETextHeaders}	$={checkMIMETextHeaders}	MIME headers for maximum arbitrary length checking
$=e	$=e	Encode this Content-Transfer-Encoding:
$=k	$=k	The local UUCP name
$=m	$=m	List of local domains
$=n	$=n	Don't encode these Content-Types
$={persistentMacros}	$={persistentMacros}	Macros preserved in the qf file
$=q	$=q	Always quoted-printable encode Content-Type:
$=s	$=s	Presume an RFC2822 7-bit body
$=t	$=t	List trusted users
$=w	$=w	List of our other names

Note that these classes really are used internally by sendmail , so don't try to redefine their use in the configuration file. Such an attempt will be doomed to failure.