Doc: Add hint about spamd and half-closed connections

[users/jgh/exim.git] / doc / doc-txt / NewStuff

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index cca958f79a3b205ce7cd8349ed13d2fb15bcc1b5..013004bb98e55267aecdadbcbb985d394e348c85 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -21,7 +21,7 @@ Version 4.88
     N can be 224, 256 (default), 384, 512.
     With GnuTLS 3.5.0 or later, only.
 
- 5. Facility for named queues:  A commandline argument can specify
+ 5. Facility for named queues:  A command-line argument can specify
     the queue name for a queue operation, and an ACL modifier can set
     the queue to be used for a message.  A $queue_name variable gives
     visibility.
@@ -54,6 +54,17 @@ Version 4.88
 14. If built with EXPERIMENTAL_QUEUEFILE, a queuefile transport, for writing
     out copies of the message spool files for use by 3rd-party scanners.
 
+15. A new option on the smtp transport, hosts_try_fastopen.  If the system
+    supports it (on Linux it must be enabled in the kernel by the sysadmin)
+    try to use RFC 7413 "TCP Fast Open".  No data is sent on the SYN segment
+    but it permits a peer that also supports the facility to send its SMTP
+    banner immediately after the SYN,ACK segment rather then waiting for
+    another ACK - so saving up to one roundtrip time.  Because it requires
+    previous communication with the peer (we save a cookie from it) this
+    will only become active on frequently-contacted destinations.
+
+16. A new syslog_pid option to suppress PID duplication in syslog lines.
+
 
 Version 4.87
 ------------
@@ -81,7 +92,7 @@ Version 4.87
     synonym of the latter).  Add support in base64 for certificates.
 
  8. New main configuration option "bounce_return_linesize_limit" to
-    avoid oversize bodies in bounces. The dafault value matches RFC
+    avoid oversize bodies in bounces. The default value matches RFC
     limits.
 
  9. New $initial_cwd expansion variable.
@@ -101,7 +112,7 @@ Version 4.86
 
  5. Assorted options on malware= and spam= scanners.
 
- 6. A commandline option to write a comment into the logfile.
+ 6. A command-line option to write a comment into the logfile.
 
  7. If built with EXPERIMENTAL_SOCKS feature enabled, the smtp transport can
     be configured to make connections via socks5 proxies.
@@ -129,7 +140,7 @@ Version 4.85
 ------------
 
  1. If built with EXPERIMENTAL_DANE feature enabled, Exim will follow the
-    DANE smtp draft to assess a secure chain of trust of the certificate
+    DANE SMTP draft to assess a secure chain of trust of the certificate
     used to establish the TLS connection based on a TLSA record in the
     domain of the sender.
 
@@ -325,7 +336,7 @@ Version 4.82
 16. New authenticated_sender logging option, adding to log field "A".
 
 17. New expansion variables $router_name and $transport_name.  Useful
-    particularly for debug_print as -bt commandline option does not
+    particularly for debug_print as -bt command-line option does not
     require privilege whereas -d does.
 
 18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a