X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/8ac90765750f87c573300b9e953af3d8090cab8b..d16931c81f3e500fa6eafe5ec1c5d8e7db63e65a:/doc/doc-txt/experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 43f14237b..7805c258e 100644
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -709,6 +709,8 @@ an external directory retaining the exim spool format.
 
 The spool files can then be processed by external processes and then
 requeued into exim spool directories for final delivery.
+However, note carefully the warnings in the main documentation on
+qpool file formats.
 
 The motivation/inspiration for the transport is to allow external
 processes to access email queued by exim and have access to all the
@@ -881,12 +883,15 @@ The Exim implementation includes
 
 Differences from spec:
 - we support upgrading the requirement for REQUIRETLS, including adding
-  it from cold, withing an MTA.  The spec only define the sourcing MUA
+  it from cold, within an MTA.  The spec only define the sourcing MUA
   as being able to source the requirement, and makes no mention of upgrade.
 - No support is coded for the RequireTLS header (which can be used
-  to annul DANE and/or STS policiy). [can this be done in ACL?]
+  to annul DANE and/or STS policiy). [this can _almost_ be done in
+  transport option expansions, but not quite: it requires tha DANE-present
+  but STARTTLS-failing targets fallback to cleartext, which current DANE
+  coding specifically blocks]
 
-Note that REQUIRETLS is only advertised once a TLS connection is acheived
+Note that REQUIRETLS is only advertised once a TLS connection is achieved
 (in contrast to STARTTLS).  If you want to check the advertising, do something
 like "swaks -s 127.0.0.1 -tls -q HELO".