X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/aec45841f9139404fd61122e3db1401b13ebb0a8..8acbb134096a6377737c435d43497dd79d17d081:/doc/doc-txt/experimental-spec.txt?ds=inline diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt index 1d3715f78..bdab74841 100644 --- a/doc/doc-txt/experimental-spec.txt +++ b/doc/doc-txt/experimental-spec.txt @@ -791,7 +791,7 @@ expansion is done. The current list of events is: msg:fail:internal after main per recipient tcp:connect before transport per connection tcp:close after transport per connection - tls:cert before transport per certificate in verification chain + 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 @@ -821,7 +821,7 @@ The following variables are likely to be useful depending on the event type: An example might look like: -event_action = ${if = {msg:delivery}{$event_name} \ +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}}', \ @@ -852,6 +852,10 @@ following will be forced: No other use is made of the result string. +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 thse loaded locally. Redis Lookup @@ -1080,82 +1084,6 @@ QUIT 221 mail.example.net closing connection -DSN Support --------------------------------------------------------------- - -DSN Support tries to add RFC 3461 support to Exim. It adds support for -*) the additional parameters for MAIL FROM and RCPT TO -*) RFC complient MIME DSN messages for all of - success, failure and delay notifications -*) dsn_advertise_hosts main option to select which hosts are able - to use the extension -*) dsn_lasthop router switch to end DSN processing - -In case of failure reports this means that the last three parts, the message body -intro, size info and final text, of the defined template are ignored since there is no -logical place to put them in the MIME message. - -All the other changes are made without changing any defaults - -Building exim: --------------- - -Define -EXPERIMENTAL_DSN=YES -in your Local/Makefile. - -Configuration: --------------- -All DSNs are sent in MIME format if you built exim with EXPERIMENTAL_DSN=YES -No option needed to activate it, and no way to turn it off. - -Failure and delay DSNs are triggered as usual except a sender used NOTIFY=... -to prevent them. - -Support for Success DSNs is added and activated by NOTIFY=SUCCESS by clients. - -Add -dsn_advertise_hosts = * -or a more restrictive host_list to announce DSN in EHLO answers - -Those hosts can then use NOTIFY,ENVID,RET,ORCPT options. - -If a message is relayed to a DSN aware host without changing the envelope -recipient the options are passed along and no success DSN is generated. - -A redirect router will always trigger a success DSN if requested and the DSN -options are not passed any further. - -A success DSN always contains the recipient address as submitted by the -client as required by RFC. Rewritten addresses are never exposed. - -If you used DSN patch up to 1.3 before remove all "dsn_process" switches from -your routers since you don't need them anymore. There is no way to "gag" -success DSNs anymore. Announcing DSN means answering as requested. - -You can prevent Exim from passing DSN options along to other DSN aware hosts by defining -dsn_lasthop -in a router. Exim will then send the success DSN himself if requested as if -the next hop does not support DSN. -Adding it to a redirect router makes no difference. - - -Certificate name checking --------------------------------------------------------------- -The X509 certificates used for TLS are supposed be verified -that they are owned by the expected host. The coding of TLS -support to date has not made these checks. - -If built with EXPERIMENTAL_CERTNAMES defined, code is -included to do so, and a new smtp transport option -"tls_verify_cert_hostname" supported which takes a list of -names for which the checks must be made. The host must -also be in "tls_verify_hosts". - -Both Subject and Subject-Alternate-Name certificate fields -are supported, as are wildcard certificates (limited to -a single wildcard being the initial component of a 3-or-more -component FQDN). DANE @@ -1279,12 +1207,13 @@ MX, A and TLSA records. A TLSA lookup will be done if either of the above options match and the host-lookup succeded using dnssec. -If the TLSA lookup succeeds, a TLS connection will be required -for the host. +If a TLSA lookup is done and succeeds, a DANE-verified TLS connection +will be required for the host. (TODO: specify when fallback happens vs. when the host is not used) -If dane is in use the following transport options are ignored: +If DANE is requested and useable (see above) the following transport +options are ignored: hosts_require_tls tls_verify_hosts tls_try_verify_hosts @@ -1292,6 +1221,10 @@ If dane is in use the following transport options are ignored: tls_crl tls_verify_cert_hostnames +If DANE is not usable, whether requested or not, and CA-anchored +verification evaluation is wanted, the above variables should be set +appropriately. + Currently dnssec_request_domains must be active (need to think about that) and dnssec_require_domains is ignored. @@ -1300,7 +1233,7 @@ in the delivery log line will show as "CV=dane". There is a new variable $tls_out_dane which will have "yes" if verification succeeded using DANE and "no" otherwise (only useful -in combination with EXPERIMENTAL_TPDA), and a new variable +in combination with EXPERIMENTAL_EVENT), and a new variable $tls_out_tlsa_usage (detailed above).