diff options
Diffstat (limited to 'doc/doc-txt')
| -rw-r--r-- | doc/doc-txt/NewStuff | 9 | ||||
| -rw-r--r-- | doc/doc-txt/OptionLists.txt | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff index cca958f79..83ee4c3af 100644 --- a/doc/doc-txt/NewStuff +++ b/doc/doc-txt/NewStuff @@ -54,6 +54,15 @@ 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-contected destinations. + Version 4.87 ------------ diff --git a/doc/doc-txt/OptionLists.txt b/doc/doc-txt/OptionLists.txt index 53c07436a..dc16b6dee 100644 --- a/doc/doc-txt/OptionLists.txt +++ b/doc/doc-txt/OptionLists.txt @@ -300,6 +300,7 @@ hosts_require_ocsp host list unset smtp hosts_require_tls host list unset smtp 3.20 hosts_treat_as_local domain list unset main 1.95 hosts_try_auth host list unset smtp 4.00 +hosts_try_fastopen host list unset smtp 4.88 hosts_try_prdr host list unset smtp 4.82 if experimental_prdr ibase_servers string unset main 4.23 ignore_bounce_errors_after time 0s main 4.00 |