| 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. |