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Diffstat (limited to 'contrib/sendmail/contrib/domainmap.m4')
| -rw-r--r-- | contrib/sendmail/contrib/domainmap.m4 | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/contrib/sendmail/contrib/domainmap.m4 b/contrib/sendmail/contrib/domainmap.m4 new file mode 100644 index 0000000..31d284c --- /dev/null +++ b/contrib/sendmail/contrib/domainmap.m4 @@ -0,0 +1,90 @@ +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> |
