Classes

There are many classes available for use with the K command and for use in rewriting rules. Some require special compile flags to be included when sendmail is built.

• btree
• Uses Berkeley's db form of database. Database file names have a db appended (see §33.8.1).
• bestmx
• Looks up the best MX record for a host (see §33.8.2).
• dbm
• Uses the ndbm form of database. The database is formed of two files, one whose name ends in pag and the other in dir (see §33.8.3).
• dequote
• Removes quotation marks (see §33.8.4).
• hash
• Uses Berkeley's db form of database (see §33.8.5).
• hesiod
• Uses MIT network user authentication services (see §33.8.6).
• host
• Uses an internal table to store and look up hostnames (see §33.4.3).
• implicit
• Searches for an aliases database file (see §33.8.8).
• ldapx
• Uses the Lightweight Directory Access Protocol (see §33.8.9).
• netinfo
• Uses NeXT Computer's network information services (see §33.8.10).
• nis
• Uses Sun's Network Information Services (nis, see §33.8.11).
• nisplus
• Uses Sun's newer Network Information Services (nisplus, see §33.8.12).
• null
• Provides a "never found" service (for internal use only, see §33.8.13).
• program
• Runs an external program to look up the key (see §33.8.14).
• sequence
• Searches a series of maps (see §33.8.15).
• stab
• Loads aliases into the symbol table (internally) (see §33.8.16).
• switch
• Auto-builds sequences of databases based on service-switch file entries (see §33.8.17).
• text
• Looks up keys in flat text files (see §33.8.18).
• userdb
• Uses the User Database (see §33.8.19).
• user
• Looks up local passwd(5) information (see §33.8.20).