-Event Actions
---------------------------------------------------------------
-
-(Renamed from TPDA, Transport post-delivery actions)
-
-An arbitrary per-transport string can be expanded upon various transport events.
-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.
-
-In order to use the feature, you must compile with
-
-EXPERIMENTAL_EVENT=yes
-
-in your Local/Makefile
-
-and define one or both of
-- the event_action option in the transport
-- the event_action main option
-to be expanded when the event fires.
-
-A new variable, $event_name, is set to the event type when the
-expansion is done. The current list of events is:
-
- msg:complete after main per message
- msg:delivery after transport per recipient
- msg:rcpt:host:defer after transport per recipient per host
- msg:rcpt:defer after transport per recipient
- msg:host:defer after transport per attempt
- msg:fail:delivery after main per recipient
- msg:fail:internal after main per recipient
- tcp:connect before transport per connection
- tcp:close after transport per connection
- tls:cert before both per certificate in verification chain
- smtp:connect after transport per connection
-
-The expansion is called for all event types, and should use the $event_name
-variable to decide when to act. The value of the variable is a colon-separated
-list, defining a position in the tree of possible events; it may be used as
-a list or just matched on as a whole. There will be no whitespace.
-
-New event types may be added in the future.
-
-
-There is an auxilary variable, $event_data, for which the
-content is event_dependent:
-
- msg:delivery smtp confirmation mssage
- msg:rcpt:host:defer error string
- msg:rcpt:defer error string
- msg:host:defer error string
- tls:cert verification chain depth
- smtp:connect smtp banner
-
-The :defer events populate one extra variable, $event_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, verify_mode
-
-
-An example might look like:
-
-event_action = ${if eq {msg:delivery}{$event_name} \
-{${lookup pgsql {SELECT * FROM record_Delivery( \
- '${quote_pgsql:$sender_address_domain}',\
- '${quote_pgsql:${lc:$sender_address_local_part}}', \
- '${quote_pgsql:$domain}', \
- '${quote_pgsql:${lc:$local_part}}', \
- '${quote_pgsql:$host_address}', \
- '${quote_pgsql:${lc:$host}}', \
- '${quote_pgsql:$message_exim_id}')}} \
-} {}}
-
-The string is expanded when each of the supported events occur
-and any side-effects of the expansion will happen.
-
-Note that for complex operations an ACL expansion can be used,
-however due to the multiple contexts the Exim operates in
-a) variables set in events raised from transports will not
- be visible outside that transport call.
-b) acl_m variables in a server context are lost on a new connection,
- and after helo/ehlo/mail/starttls/rset commands
-Using an ACL expansion with the logwrite modifier can be a
-useful way of writing to the main log.
-
-
-
-The expansion of the 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
-
-No other use is made of the result string.
-
-If transport proxying is used, the remote IP/port during a
-tcp:connect event will be that of the proxy.
-
-
-Known issues:
-- the tls:cert event is only called for the cert chain elements
- received over the wire, with GnuTLS. OpenSSL gives the entire
- chain including those loaded locally.
-
-
Redis Lookup
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