redis lookup returns false for things that should be true

[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 6657f63c773f88e513d259f95164f237ef63a58c..d8bd0bf46ed103f0641f603a8231e5c958531f61 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -762,87 +762,94 @@ b. Configure, somewhere before the DATA ACL, the control option to
 Transport post-delivery actions
 --------------------------------------------------------------
 
 Transport post-delivery actions
 --------------------------------------------------------------
 

-An arbitrary per-transport string can be expanded on successful delivery,
+An arbitrary per-transport string can be expanded upon various transport events

 and (for SMTP transports) a second string on deferrals caused by a host error.
 and (for SMTP transports) a second string on deferrals caused by a host error.

+Additionally a main-section configuration option can be expanded on some
+per-message events.

 This feature may be used, for example, to write exim internal log information
 (not available otherwise) into a database.
 
 This feature may be used, for example, to write exim internal log information
 (not available otherwise) into a database.
 

-In order to use the feature, you must set
+In order to use the feature, you must compile with

 
 EXPERIMENTAL_TPDA=yes
 
 in your Local/Makefile
 
 
 EXPERIMENTAL_TPDA=yes
 
 in your Local/Makefile
 

-and define the expandable strings in the runtime config file, to
-be executed at end of delivery.
+and define one or both of
+- the tpda_event_action option in the transport
+- the delivery_event_action
+to be expanded when the event fires.

 
 

-Additionally, there are 6 more variables, available at end of
-delivery:
+A new variable, $tpda_event, is set to the event type when the
+expansion is done.  The current list of events is:

 
 

-tpda_delivery_ip             IP of host, which has accepted delivery
-tpda_delivery_port           Port of remote host which has accepted delivery
-tpda_delivery_fqdn           FQDN of host, which has accepted delivery
-tpda_delivery_local_part     local part of address being delivered
-tpda_delivery_domain         domain part of address being delivered
-tpda_delivery_confirmation   SMTP confirmation message
+       msg:complete            main            per message
+       msg:delivery            transport       per recipient
+       msg:host:defer          transport       per attempt
+       msg:fail:delivery       main            per recipient
+       msg:fail:internal       main            per recipient
+       tcp:connect             transport       per connection
+       tcp:close               transport       per connection
+       tls:cert                transport       per certificate in verification chain
+       smtp:connect            transport       per connection

 
 

-In case of a deferral caused by a host-error:
-tpda_defer_errno             Error number
-tpda_defer_errstr            Error string possibly containing more details
+The expansion is called for all event types, and should use the $tpda_event
+value to decide when to act.  The variable data is a colon-separated
+list, describing an event tree.

 
 

-The $router_name and $transport_name variables are also usable.
+There is an auxilary variable, $tpda_data, for which the
+content is event_dependent:

 
 

+       msg:delivery            smtp confirmation mssage
+       msg:host:defer          error string
+       tls:cert                verification chain depth
+       smtp:connect            smtp banner

 
 

-To take action after successful deliveries, set the following option
-on any transport of interest.
+The msg:host:defer event populates one extra variable, $tpda_defer_errno.
+
+The following variables are likely to be useful depending on the event type:
+
+       router_name, transport_name
+       local_part, domain
+       host, host_address, host_port
+       tls_out_peercert
+       lookup_dnssec_authenticated, tls_out_dane
+       sending_ip_address, sending_port
+       message_exim_id

 
 

-tpda_delivery_action

 
 An example might look like:
 
 
 An example might look like:
 

-tpda_delivery_action = \
-${lookup pgsql {SELECT * FROM record_Delivery( \
+tpda_event_action = ${if = {msg:delivery}{$tpda_event} \
+{${lookup pgsql {SELECT * FROM record_Delivery( \

     '${quote_pgsql:$sender_address_domain}',\
     '${quote_pgsql:${lc:$sender_address_local_part}}', \
     '${quote_pgsql:$sender_address_domain}',\
     '${quote_pgsql:${lc:$sender_address_local_part}}', \

-    '${quote_pgsql:$tpda_delivery_domain}', \
-    '${quote_pgsql:${lc:$tpda_delivery_local_part}}', \
-    '${quote_pgsql:$tpda_delivery_ip}', \
-    '${quote_pgsql:${lc:$tpda_delivery_fqdn}}', \
-    '${quote_pgsql:$message_exim_id}')}}
-
-The string is expanded after the delivery completes and any
+    '${quote_pgsql:$domain}', \
+    '${quote_pgsql:${lc:$local_part}}', \
+    '${quote_pgsql:$host_address}', \
+    '${quote_pgsql:${lc:$host}}', \
+    '${quote_pgsql:$message_exim_id}')}} \
+} {}}
+
+The string is expanded for each of the supported events and any

 side-effects will happen.  The result is then discarded.
 Note that for complex operations an ACL expansion can be used.
 
 
 side-effects will happen.  The result is then discarded.
 Note that for complex operations an ACL expansion can be used.
 
 

-In order to log host deferrals, add the following option to an SMTP
-transport:
-
-tpda_host_defer_action
-
-This is a private option of the SMTP transport. It is intended to
-log failures of remote hosts. It is executed only when exim has
-attempted to deliver a message to a remote host and failed due to
-an error which doesn't seem to be related to the individual
-message, sender, or recipient address.
-See section 47.2 of the exim documentation for more details on how
-this is determined.
-
-Example:
-
-tpda_host_defer_action = \
-${lookup mysql {insert into delivlog set \
-    msgid = '${quote_mysql:$message_exim_id}', \
-    senderlp = '${quote_mysql:${lc:$sender_address_local_part}}', \
-    senderdom = '${quote_mysql:$sender_address_domain}', \
-    delivlp = '${quote_mysql:${lc:$tpda_delivery_local_part}}', \
-    delivdom = '${quote_mysql:$tpda_delivery_domain}', \
-    delivip = '${quote_mysql:$tpda_delivery_ip}', \
-    delivport = '${quote_mysql:$tpda_delivery_port}', \
-    delivfqdn = '${quote_mysql:$tpda_delivery_fqdn}', \
-    deliverrno = '${quote_mysql:$tpda_defer_errno}', \
-    deliverrstr = '${quote_mysql:$tpda_defer_errstr}' \
-    }}
+The expansion of the tpda_event_action option should normally
+return an empty string.  Should it return anything else the
+following will be forced:
+
+       msg:delivery    (ignored)
+       msg:host:defer  (ignored)
+       msg:fail:delivery (ignored)
+       tcp:connect     do not connect
+       tcp:close       (ignored)
+       tls:cert        refuse verification
+       smtp:connect    close connection
+
+
+

 
 
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