Table 23-15. The host database-map type K command switches
Switch ?§ Description
-a ?§23.3.2 on page 887 Append tag on successful match.
-d ?§24.9.119.22 The res_search( ) _res.retry interval (V8.12 and later).
-D ?§23.3.3 on page 887 Don??™t use this database map if DeliveryMode=defer.
-m ?§23.3.7 on page 888 Suppress replacement on match.
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23.7 Alphabetized Database-Map Types | 911
The -D database switch should probably always be used with this type on sites that have
dial-on-demand connections to the Internet. It prevents host lookups when the
DeliveryMode option (?§24.9.35 on page 1004) is set to defer.
23.7.10 implicit
Search for an aliases database entry V8.1 and later
The implicit database-map type refers specifically to aliases(5) files only. It causes sendmail
to first try to open a db(3) hash-style alias file. If that fails or if NEWDB support was
not compiled in, it tries to open an ndbm(3)-style database. If that fails, sendmail reads the
aliases(5) source file into its internal symbol table.
When sendmail rebuilds its aliases database (as with newaliases) it looks for the special
string literal /yp/ anywhere in the path specified for the aliases source file. If that string
literal is found, sendmail uses this implicit type to create botha db(3) hash-style alias file,
and an ndbm(3)-style database.
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