X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/7019e10b7ab291e67b3499623547ea755098f972..4af0d74a886c7fbd4e3eec1743f4b1d2d8a4d457:/doc/doc-txt/experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 3dbf13f9d..d446f6b67 100644
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -1278,7 +1278,7 @@ RFCs 6530, 6533, 5890
 
 Compile with EXPERIMENTAL_INTERNATIONAL and libidn.
 
-Main config option smtputf8_advertise_hosts, default '*',
+New main config option smtputf8_advertise_hosts, default '*',
 a host list.  If this matches the sending host and
 accept_8bitmime is true (the default) then the ESMTP option
 SMTPUTF8 will be advertised.
@@ -1291,15 +1291,51 @@ The option allow_utf8_domains is set to true for this
 message. All DNS lookups are converted to a-label form
 whatever the setting of allow_utf8_domains.
 
+Both localparts and domain are maintained as the original
+utf8 form internally; any matching or regex use will
+require appropriate care.  Filenames created, eg. by
+the appendfile transport, will have utf8 name.
+
+Helo names sent by the smtp transport will have any utf8
+components expanded to a-label form.
+
+Any certificate name checks will be done using the a-label
+form of the name.
+
 Log lines and Received-by: header lines will aquire a "utf8"
 prefix on the protocol element, eg. utf8esmtp.
 
-Expansion operators:
+New expansion operators:
 	${utf8_domain_to_alabel:str}
 	${utf8_domain_from_alabel:str}
 	${utf8_localpart_to_alabel:str}
 	${utf8_localpart_from_alabel:str}
 
+New "control = utf8_downconvert" ACL modifier,
+sets a flag requiring that addresses are converted to
+a-label form before smtp delivery, for use in a
+Message Submission Agent context.  Can also be
+phrased as "control = utf8_downconvert/1" and is
+mandatory.  The flag defaults to zero and can be cleared
+by "control = utf8_downconvert/0".  The value "-1"
+may also be used, to use a-label for only if the
+destination host does not support SMTPUTF8.
+
+If mua_wrapper is set, the utf8_downconvert control
+defaults to -1 (convert if needed).
+
+
+There is no explicit support for VRFY and EXPN.
+Configurations supporting these should inspect
+$smtp_command_argument for an SMTPUTF8 argument.
+
+There is no support for LMTP on Unix sockets.
+Using the "lmtp" protocol option on an smtp transport,
+for LMTP over TCP, should work as expected.
+
+Known issues:
+ - DSN unitext handling is not present
+ - no provision for converting logging from or to UTF-8
 
 --------------------------------------------------------------
 End of file