Bug 1289: Clarify host list processing failures

[users/heiko/exim.git] / doc / doc-txt / experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 3e8f5c549fcdc6a167af37833f2242d8353b68da..a5024d8271a5c8ea8795a97e1d32c7e79d17e4d1 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -755,11 +755,13 @@ mean, refer to the DMARC website above.  Valid strings are:
                 rejecting the email.
   o quarantine  The DMARC check failed and the library recommends
                 keeping it for further inspection.
                 rejecting the email.
   o quarantine  The DMARC check failed and the library recommends
                 keeping it for further inspection.

+  o none        The DMARC check passed and the library recommends
+                no specific action, neutral.

   o norecord    No policy section in the DMARC record for this
                 sender domain.
   o nofrom      Unable to determine the domain of the sender.
   o norecord    No policy section in the DMARC record for this
                 sender domain.
   o nofrom      Unable to determine the domain of the sender.

-  o none        There is no DMARC record for this sender domain.
-  o error       Library error or dns error.
+  o temperror   Library error or dns error.
+  o off         The DMARC check was disabled for this email.

 
 You can prefix each string with an exclamation mark to invert its
 meaning, for example "!accept" will match all results but
 
 You can prefix each string with an exclamation mark to invert its
 meaning, for example "!accept" will match all results but


@@ -929,6 +931,91 @@ ${lookup mysql {insert into delivlog set \
     deliverrstr = '${quote_mysql:$tpda_defer_errstr}' \
     }}
 
     deliverrstr = '${quote_mysql:$tpda_defer_errstr}' \
     }}
 

+
+Redis Lookup
+--------------------------------------------------------------
+
+Redis is open source advanced key-value data store. This document
+does not explain the fundamentals, you should read and understand how
+it works by visiting the website at http://www.redis.io/.
+
+Redis lookup support is added via the hiredis library.  Visit:
+
+  https://github.com/redis/hiredis
+
+to obtain a copy, or find it in your operating systems package repository.
+If building from source, this description assumes that headers will be in
+/usr/local/include, and that the libraries are in /usr/local/lib.
+
+1. In order to build exim with Redis lookup support add
+
+EXPERIMENTAL_REDIS=yes
+
+to your Local/Makefile. (Re-)build/install exim. exim -d should show
+Experimental_Redis in the line "Support for:".
+
+EXPERIMENTAL_REDIS=yes
+LDFLAGS += -lhiredis
+# CFLAGS += -I/usr/local/include
+# LDFLAGS += -L/usr/local/lib
+
+The first line sets the feature to include the correct code, and
+the second line says to link the hiredis libraries into the
+exim binary.  The commented out lines should be uncommented if you
+built hiredis from source and installed in the default location.
+Adjust the paths if you installed them elsewhere, but you do not
+need to uncomment them if an rpm (or you) installed them in the
+package controlled locations (/usr/include and /usr/lib).
+
+
+2. Use the following global settings to configure Redis lookup support:
+
+Required:
+redis_servers       This option provides a list of Redis servers
+                    and associated connection data, to be used in
+                    conjunction with redis lookups. The option is
+                    only available if Exim is configured with Redis
+                    support.
+
+For example:
+
+redis_servers = 127.0.0.1/10/ - using database 10 with no password
+redis_servers = 127.0.0.1//password - to make use of the default database of 0 with a password
+redis_servers = 127.0.0.1// - for default database of 0 with no password
+
+3. Once you have the Redis servers defined you can then make use of the
+experimental Redis lookup by specifying ${lookup redis{}} in a lookup query.
+
+4. Example usage:
+
+(Host List)
+hostlist relay_from_ips = <\n ${lookup redis{SMEMBERS relay_from_ips}}
+
+Where relay_from_ips is a Redis set which contains entries such as "192.168.0.0/24" "10.0.0.0/8" and so on.
+The result set is returned as
+192.168.0.0/24
+10.0.0.0/8
+..
+.
+
+(Domain list)
+domainlist virtual_domains = ${lookup redis {HGET $domain domain}}
+
+Where $domain is a hash which includes the key 'domain' and the value '$domain'.
+
+(Adding or updating an existing key)
+set acl_c_spammer = ${if eq{${lookup redis{SPAMMER_SET}}}{OK}}
+
+Where SPAMMER_SET is a macro and it is defined as
+
+"SET SPAMMER <some_value>"
+
+(Getting a value from Redis)
+
+set acl_c_spam_host = ${lookup redis{GET...}}
+
+
+

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