Taint: fix hybrid-mode transition

[users/jgh/exim.git] / src / README.UPDATING

diff --git a/src/README.UPDATING b/src/README.UPDATING
index 11cd0ba441208695217c0b1f6535e5b3e67b41cb..94a1420eb7aa73d0cacadc75c6aa196621e301f3 100644 (file)
--- a/src/README.UPDATING
+++ b/src/README.UPDATING
@@ -26,6 +26,49 @@ The rest of this document contains information about changes in 4.xx releases
 that might affect a running system.
 
 
+Exim version 4.94
+-----------------
+
+Some Transports now refuse to use tainted data in constructing their delivery
+location; this WILL BREAK configurations which are not updated accordingly.
+
+In particular: any Transport use of $local_user which has been relying upon
+check_local_user far away in the Router to make it safe, should be updated to
+replace $local_user with $local_part_verified.
+
+
+Exim version 4.93
+-----------------
+
+For a detailed list of changes that might affect Exim's operation with
+an unchanged configuration, please see the doc/ChangeLog file.
+
+Build:
+
+ * SUPPORT_DMARC replaces EXPERIMENTAL_DMARC
+
+ * DISABLE_TLS replaces SUPPORT_TLS
+
+ * Bump the version for the local_scan API.
+
+Runtime:
+
+ * smtp transport option hosts_try_fastopen defaults to "*".
+
+ * DNSSec is requested (not required) for all queries. (This seemes to
+   ask for trouble if your resolver is a systemd-resolved.)
+
+ * Generic router option retry_use_local_part defaults to "true" under specific
+   pre-conditions.
+
+ * Introduce a tainting mechanism for values read from untrusted sources.
+
+ * Use longer file names for temporary spool files (this avoids
+   name conflicts with spool on a shared file system).
+
+ * Use dsn_from main config option (was ignored previously).
+
+
 Exim version 4.92
 -----------------
 
@@ -34,8 +77,6 @@ Exim version 4.92
    is limited to one retry unless the (new) config option dns_cname_loops
    is changed.
 
- * Support for Rspamd has been removed.
-
 Exim version 4.91
 -----------------
 
@@ -94,7 +135,7 @@ Exim version 4.83
 -----------------
 
  * SPF condition results renamed "permerror" and "temperror".  The old
-   names are still accepted for back-compatability, for this release.
+   names are still accepted for back-compatibility, for this release.
 
  * TLS details are now logged on rejects, subject to log selectors.
 
@@ -135,7 +176,7 @@ Exim version 4.80
    upgrading, then lock the message, replace the new-lines that should be part
    of the -tls_peerdn line with the two-character sequence \n and then unlock
    the message.  No tool has been provided as we believe this is a rare
-   occurence.
+   occurrence.
 
  * For OpenSSL, SSLv2 is now disabled by default.  (GnuTLS does not support
    SSLv2).  RFC 6176 prohibits SSLv2 and some informal surveys suggest no
@@ -348,7 +389,7 @@ Exim version 4.70
 -----------------
 
 1. Experimental Yahoo! Domainkeys support has been dropped in this release.
-It has been superceded by a native implementation of its successor DKIM.
+It has been superseded by a native implementation of its successor DKIM.
 
 2. Up to version 4.69, Exim came with an embedded version of the PCRE library.
 As of 4.70, this is no longer the case. To compile Exim, you will need PCRE