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.
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.
+
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.
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.
------------
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.
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