sendmail, 4th Edition

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 V8.14.

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

Class	§	Description
$=b	$=b on page 870	MIME types for no NL-to-CRLF translation
$={checkMIMEFieldHeaders}	$={checkMIMEFieldHeaders} on page 870	MIME headers for maximum parameter length checking
$={checkMIMEHeaders}	$={checkMIMEHeaders} on page 871	MIME headers for maximum legal length checking
$={checkMIMETextHeaders}	$={checkMIMETextHeaders} on page 871	MIME headers for maximum arbitrary length checking
$=e	$=e on page 872	Encode this Content-Transfer-Encoding:
$=k	$=k on page 872	The local UUCP name
$=m	$=m on page 872	List of local domains
$=n	$=n on page 873	Don’t encode these Content-Types
$={persistentMacros}	$={persistentMacros} on page 873	Macros preserved in the qf file
$=q	$=q on page 874	Always quoted-printable encode Content-Type:
$=s	$=s on page 875	Presume an RFC2822 7-bit body
$=t	$=t on page 875	List of trusted users
$=w	$=w on page 876	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.