Introduce EXPERIMENTAL_DANE feature

[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 769f0229de03171266cee6c9d47a5e1b60a7afa9..2f44fce26fb7ff7be6788c832265f4842e70c34a 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -762,8 +762,10 @@ b. Configure, somewhere before the DATA ACL, the control option to
 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.
+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.
 
@@ -773,18 +775,23 @@ EXPERIMENTAL_TPDA=yes
 
 in your Local/Makefile
 
-and define the tpda_event_action option in the transport, to
-be expanded when the event fires.
+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.
 
 A new variable, $tpda_event, is set to the event type when the
 expansion is done.  The current list of events is:
 
-       msg:delivery
-       msg:host:defer
-       tcp:connect
-       tcp:close
-       tls:cert
-       smtp:connect
+       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
 
 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
@@ -800,7 +807,7 @@ content is event_dependent:
 
 The msg:host:defer event populates one extra variable, $tpda_defer_errno.
 
-The following variables are likely to be useful for most event types:
+The following variables are likely to be useful depending on the event type:
 
        router_name, transport_name
        local_part, domain
@@ -808,6 +815,7 @@ The following variables are likely to be useful for most event types:
        tls_out_peercert
        lookup_dnssec_authenticated, tls_out_dane
        sending_ip_address, sending_port
+       message_exim_id
 
 
 An example might look like:
@@ -823,13 +831,10 @@ tpda_event_action = ${if = {msg:delivery}{$tpda_event} \
     '${quote_pgsql:$message_exim_id}')}} \
 } {}}
 
-The string is expanded after the delivery completes and any
+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.
 
-During the expansion the tpda_event variable will contain the
-string-list "msg:delivery".
-
 
 The expansion of the tpda_event_action option should normally
 return an empty string.  Should it return anything else the
@@ -837,6 +842,7 @@ 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