X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/1745d310db8102be38db65401df57747e9beaf6a..7b162fc84e202a16b89fa11224737ffbdd240bc8:/doc/doc-txt/experimental-spec.txt diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt index aac8ca77d..a73007700 100644 --- a/doc/doc-txt/experimental-spec.txt +++ b/doc/doc-txt/experimental-spec.txt @@ -498,6 +498,8 @@ Enable using EXPERIMENTAL_ARC=yes in your Local/Makefile. You must also have DKIM present (not disabled), and you very likely want to have SPF enabled. +It is possible to build as a dynamic-load module: set also SUPPORT_ARC=2. + Verification -- @@ -616,7 +618,7 @@ and a whitespace-separated port number must be given. Logging protocol unusual states --------------------------------------------------------------- An extra log_selector, "protocol_detail" has been added in the default build. -The name may change in future, hence the Experimenal status. +The name may change in future, hence the Experimental status. Currrently the only effect is to enable logging, under TLS, of a TCP RST received directly after a QUIT (in server mode). @@ -628,38 +630,37 @@ being logged. -Limits ESMTP extension +XCLIENT proxy support --------------------------------------------------------------- -Per https://datatracker.ietf.org/doc/html/draft-freed-smtp-limits-01 - -If compiled with EXPERIMENTAL_ESMTP_LIMITS=yes :- - -As a server, Exim will advertise, in the EHLO response, the limit for RCPT -commands set by the recipients_max main-section config option (if it is set), -and the limit for MAIL commands set by the smtp_accept_max_per_connection -option. +Per https://www.postfix.org/XCLIENT_README.html -Note that as of writing, smtp_accept_max_per_connection is expanded but -recipients_max is not. +XCLIENT is an ESMTP extension supporting an inbound proxy. +The only client immplementation known is in Nginx +(https://nginx.org/en/docs/mail/ngx_mail_proxy_module.html) -A new main-section option "limits_advertise_hosts" controls whether -the limits are advertised; the default for the option is "*". +If compiled with EXPERIMENTAL_XCLIENT=yes :- -As a client, Exim will: +As a server, Exim will advertise XCLIENT support (conditional on a new option +"hosts_xclient") and service XCLIENT commands with parameters + ADDR + NAME + PORT + LOGIN + DESTADDR + DESTPORT +A fresh HELO/EHLO is required after a succesful XCLIENT, and the usual +values are derived from that (making the HELO and PROTO paramemters redundant). - - note an advertised MAILMAX; the lower of the value given and the - value from the transport connection_max_messages option is used. +An XCLIENT command must give both ADDR and PORT parameters if no previous +XCLIENT has succeeded in the SMTP session. - - note an advertised RCPTMAX; the lower of the - value given and the value from the transport max_rcpt option is used. - Parallisation of transactions is not done if due to a RCPTMAX, unlike - max_rcpt. +After a success: + $proxy_session variable becomes "yes" + $proxy_local_address, $proxy_local_port have the proxy "inside" values + $proxy_external_address, $proxy_external_port have the proxy "outside" values + $sender_host_address, $sender_host_port have the remot client values - - note an advertised RCPTDOMAINMAX, and behave as if the transport - multi_domains option was set to false. The value advertised is ignored. -Values advertised are only noted for TLS connections and ones for which -the server does not advertise TLS support. --------------------------------------------------------------