Initial set of warnings for the upcoming release

[exim.git] / src / README.UPDATING

diff --git a/src/README.UPDATING b/src/README.UPDATING
index 6a820bc7c3254b91021c0d8ff0e1617a26e9e7ba..590642f3e569e2047f8b4dbe66e4a8059ef4d120 100644 (file)
--- a/src/README.UPDATING
+++ b/src/README.UPDATING
@@ -26,6 +26,36 @@ The rest of this document contains information about changes in 4.xx releases
 that might affect a running system.
 
 
+Exim version 4.83
+-----------------
+
+ * SPF condition results renamed "permerror" and "temperror".  The old
+   names are still accepted for back-compatability, for this release.
+
+ * TLS details are now logged on rejects, subject to log selectors.
+
+ * Items in headers_remove lists must now have any embedded list-separators
+   doubled.
+
+ * Attempted use of the deprecated options "gnutls_require_kx" et. al.
+   now result in logged warning.
+
+
+Exim version 4.82
+-----------------
+
+ * New option gnutls_allow_auto_pkcs11 defaults false; if you have GnuTLS 2.12.0
+   or later and do want PKCS11 modules to be autoloaded, then set this option.
+
+ * A per-transport wait-<name> database is no longer updated if the transport
+   sets "connection_max_messages" to 1, as it can not be used and causes
+   unnecessary serialisation and load.  External tools tracking the state of
+   Exim by the hints databases may need modification to take this into account.
+
+ * The av_scanner option can now accept multiple clamd TCP targets, all other
+   setting limitations remain.
+
+
 Exim version 4.80
 -----------------
 
@@ -43,6 +73,12 @@ Exim version 4.80
    the message.  No tool has been provided as we believe this is a rare
    occurence.
 
+ * For OpenSSL, SSLv2 is now disabled by default.  (GnuTLS does not support
+   SSLv2).  RFC 6176 prohibits SSLv2 and some informal surveys suggest no
+   actual usage.  You can re-enable with the "openssl_options" Exim option,
+   in the main configuration section.  Note that supporting SSLv2 exposes
+   you to ciphersuite downgrade attacks.
+
  * With OpenSSL 1.0.1+, Exim now supports TLS 1.1 and TLS 1.2.  If built
    against 1.0.1a then you will get a warning message and the
    "openssl_options" value will not parse "no_tlsv1_1": the value changes
@@ -52,8 +88,9 @@ Exim version 4.80
    "openssl_options" gains "no_tlsv1_1", "no_tlsv1_2" and "no_compression".
 
    COMPATIBILITY WARNING: The default value of "openssl_options" is no longer
-   "+dont_insert_empty_fragments".  We default to unset.  That old default was
-   grandfathered in from before openssl_options became a configuration option.
+   "+dont_insert_empty_fragments".  We default to "+no_sslv2".
+   That old default was grandfathered in from before openssl_options became a
+   configuration option.
    Empty fragments are inserted by default through TLS1.0, to partially defend
    against certain attacks; TLS1.1+ change the protocol so that this is not
    needed.  The DIEF SSL option was required for some old releases of mail
@@ -105,7 +142,7 @@ Exim version 4.80
    is instead given to gnutls_priority_init(3), which expects a priority string;
    this behaviour is much closer to the OpenSSL behaviour.  See:
 
-     http://www.gnu.org/software/gnutls/manual/html_node/Priority-Strings.html
+     http://www.gnutls.org/manual/html_node/Priority-Strings.html
 
    for fuller documentation of the strings parsed.  The three gnutls_require_*
    options are still parsed by Exim and, for this release, silently ignored.