+.new
+.section "Results of list checking" SECTlistresults
+The primary result of doing a list check is a truth value.
+In some contexts additional information is stored
+about the list element that matched:
+.vlist
+.vitem hosts
+A &%hosts%& ACL condition
+will store a result in the &$host_data$& variable.
+.vitem local_parts
+A &%local_parts%& router option or &%local_parts%& ACL condition
+will store a result in the &$local_part_data$& variable.
+.vitem domains
+A &%domains%& router option or &%domains%& ACL condition
+.vitem senders
+A &%senders%& router option or &%senders%& ACL condition
+will store a result in the &$sender_data$& variable.
+.vitem recipients
+A &%recipients%& ACL condition
+will store a result in the &$recipient_data$& variable.
+.endlist
+
+The detail of the additional information depends on the
+type of match and is given below as the &*value*& information.
+.wen
+
+
+
+
.section "Named lists" "SECTnamedlists"
.cindex "named lists"
.cindex "list" "named"
as set by the &%primary_hostname%& option (or defaulted). This makes it
possible to use the same configuration file on several different hosts that
differ only in their names.
+
+.new
+The value for a match will be the primary host name/
+.wen
+
+
.next
.cindex "@[] in a domain list"
.cindex "domain list" "matching local IP interfaces"
&%local_interfaces%& and &%extra_local_interfaces%& options can be used to
control which of a host's several IP addresses are treated as local.
In today's Internet, the use of domain literals is controversial.
+
+.new
+The value for a match will be the &`@[]`& string.
+.wen
+
+
.next
.cindex "@mx_any"
.cindex "@mx_primary"
domains = <? @mx_any/ignore=<;127.0.0.1;::1 ? \
an.other.domain ? ...
.endd
+.new
+The value for a match will be the list element string (starting &`@mx_`&).
+.wen
+
+
.next
.cindex "asterisk" "in domain list"
.cindex "domain list" "asterisk in"
list item such as &`*key.ex`& matches &'donkey.ex'& as well as
&'cipher.key.ex'&.
+.new
+The value for a match will be the list element string (starting with the asterisk).
+.wen
+
.next
.cindex "regular expressions" "in domain list"
.cindex "domain list" "matching regular expression"
use the special &`\N`& sequence (see chapter &<<CHAPexpand>>&) to specify that
it is not to be expanded (unless you really do want to build a regular
expression by expansion, of course).
+
+.new
+The value for a match will be the list element string (starting with the circumflex).
+.wen
+
+
+
.next
.cindex "lookup" "in domain list"
.cindex "domain list" "matching by lookup"
domains = cdb;/etc/mail/local_domains.cdb
.endd
The appropriate type of lookup is done on the file using the domain name as the
-key. In most cases, the data that is looked up is not used; Exim is interested
+key. In most cases, the value resulting from the lookup is not used; Exim is interested
only in whether or not the key is present in the file. However, when a lookup
is used for the &%domains%& option on a router
-or a &%domains%& condition in an ACL statement, the data is preserved in the
+or a &%domains%& condition in an ACL statement, the value is preserved in the
&$domain_data$& variable and can be referred to in other router options or
other statements in the same ACL.
+.cindex "tainted data" "de-tainting"
+The value will be untainted.
+
.next
Any of the single-key lookup type names may be preceded by
select particular domains (because any domain would match), but it might have
value if the result of the lookup is being used via the &$domain_data$&
expansion variable.
+
.next
If the pattern starts with the name of a query-style lookup type followed by a
semicolon (for example, &"nisplus;"& or &"ldap;"&), the remainder of the
hold_domains = mysql;select domain from holdlist \
where domain = '${quote_mysql:$domain}';
.endd
-In most cases, the data that is looked up is not used (so for an SQL query, for
+In most cases, the value resulting from the lookup is not used (so for an SQL query, for
example, it doesn't matter what field you select). Exim is interested only in
whether or not the query succeeds. However, when a lookup is used for the
-&%domains%& option on a router, the data is preserved in the &$domain_data$&
+&%domains%& option on a router, the value is preserved in the &$domain_data$&
variable and can be referred to in other options.
+.cindex "tainted data" "de-tainting"
+The value will be untainted.
+
.next
.new
If the pattern starts with the name of a lookup type
of either kind (single-key or query-style) it may be
-followed by a command and options,
+followed by a comma and options,
The options are lookup-type specific and consist of a comma-separated list.
Each item starts with a tag and and equals "=".
.wen
+
.next
.cindex "domain list" "matching literal domain name"
If none of the above cases apply, a caseless textual comparison is made
between the pattern and the domain.
+
+The value for a match will be the list element string.
+.cindex "tainted data" "de-tainting"
+Note that this is commonly untainted
+(depending on the way the list was created).
+This is a useful way of obtaining an untainted equivalent to
+the domain, for later operations.
.endlist
+
Here is an example that uses several different kinds of pattern:
.code
domainlist funny_domains = \
projects / exim.git / blobdiff