domainmap.m4
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上传日期：2007-01-04
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- divert(-1)changequote(<<, >>)<<
- -----------------------------------------------------------------------------
- FEATURE(domainmap) Macro
-
- The existing virtusertable feature distributed with sendmail is a good
- basic approach to virtual hosting, but it is missing a few key
- features:
- 1. Ability to have a different map for each domain.
- 2. Ability to perform virtual hosting for domains which are not in $=w.
- 3. Ability to use a centralized network-accessible database (such as
- PH) which is keyed on username alone (as opposed to the
- fully-qualified email address).
- The FEATURE(domainmap) macro neatly solves these problems.
-
- The basic syntax of the macro is:
- FEATURE(domainmap, `domain.com', `map definition ...')dnl
- To illustrate how it works, here is an example:
- FEATURE(domainmap, `foo.com', `dbm -o /etc/mail/foo-users')dnl
- In this example, mail sent to user@foo.com will be rewritten by the
- domainmap. The username will be looked up in the DBM map
- /etc/mail/foo-users, which looks like this:
- jsmith johnsmith@mailbox.foo.com
- jdoe janedoe@sandbox.bar.com
- So mail sent to jsmith@foo.com will be relayed to
- johnsmith@mailbox.foo.com, and mail sent to jdoe@foo.com will be
- relayed to janedoe@sandbox.bar.com.
-
- The FEATURE(domainmap) Macro supports the user+detail syntax by
- stripping off the +detail portion before the domainmap lookup and
- tacking it back on to the result. Using the example above, mail sent
- to jsmith+sometext@foo.com will be rewritten as
- johnsmith+sometext@mailbox.foo.com.
-
- If one of the elements in the $=w class (i.e., "local" delivery hosts)
- is a domain specified in a FEATURE(domainmap) entry, you need to use
- the LOCAL_USER(username) macro to specify the list of users for whom
- domainmap lookups should not be done.
- To use this macro, simply copy this file into the cf/feature directory
- in the sendmail source tree. For more information, please see the
- following URL:
- http://www-wsg.cso.uiuc.edu/sendmail/patches/domainmap.html
- Feedback is welcome.
- Mark D. Roth <roth@uiuc.edu>
- -----------------------------------------------------------------------------
- >>changequote(`, ')undivert(-1)divert
- ifdef(`_DOMAIN_MAP_',`',`dnl
- LOCAL_RULE_0
- # do mapping for domains where applicable
- R$* $=O $* <@ $={MappedDomain} .> $@ $>97 $1 $2 $3 Strip extraneous routing
- R$+ <@ $={MappedDomain} .> $>DomainMapLookup $1 <@ $2 .> domain mapping
- LOCAL_RULESETS
- ###########################################################################
- ### Ruleset DomainMapLookup -- special rewriting for mapped domains ###
- ###########################################################################
- SDomainMapLookup
- R $=L <@ $=w .> $@ $1 <@ $2 .> weed out local users, in case
- # Cw contains a mapped domain
- R $+ <@ $+ .> $1 <@ $2 > strip trailing dot
- R $+ <@ $+ . $+ > $1 <@ $(dequote $2 "_" $3 $) >
- # change "." to "_"
- R $+ <@ $+ > $: $1 <@ $(dequote "domain_" $2 $) >
- # prepend "domain_"
- R $+ + $+ <@ $*> $1 <@ $3 > <+> $2 handle user+list syntax
- R $+ <@ $* > $* $( $2 $1 $: <ERROR> $) $3
- # do actual domain map lookup
- R <ERROR> $* $#error $@ 5.1.1 $: "550 email address lookup in domain map failed"
- R $* <TEMP> $* $#error $@ 4.3.0 $: "450 domain map temporarily unavailable"
- R $+ @ $+ <+> $+ $1 + $3 @ $2 reset original user+list
- R $+ <+> $* $1 paranoid check - remove <+>
- R $+ @ $+ . $1 @ $2 strip trailing dot
- R $+ @ $+ $@ $>97 $1 @ $2 recanonify
- define(`_DOMAIN_MAP_',`1')')
- LOCAL_CONFIG
- C{MappedDomain} _ARG_
- K `domain_'translit(_ARG_, `.', `_') _ARG2_ -T<TEMP>
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