From 9db451e0dcb29fea639a88ec7da266b5790fda51 Mon Sep 17 00:00:00 2001 From: Jeremy Harris Date: Sun, 22 Oct 2017 20:40:11 +0100 Subject: [PATCH] Docs: expand TFO information --- doc/doc-docbook/spec.xfpt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index 29d0d900e..f91a4af96 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -24147,7 +24147,7 @@ This option provides a list of servers to which, provided they announce CHUNKING support, Exim will attempt to use BDAT commands rather than DATA. BDAT will not be used in conjunction with a transport filter. -.option hosts_try_fastopen smtp "host list!!" unset +.option hosts_try_fastopen smtp "host list&!!" unset .cindex "fast open, TCP" "enabling, in client" .cindex "TCP Fast Open" "enabling, in client" .cindex "RFC 7413" "TCP Fast Open" @@ -24163,6 +24163,9 @@ as the initiator must present a cookie in the SYN segment. On (at least some) current Linux distributions the facility must be enabled in the kernel by the sysadmin before the support is usable. +There is no option for control of the server side; if the system supports +it it is always enebled. Note that legthy operations in the connect ACL, +such as DNSBL lookups, will still delay the emission of the SMTP banner. .option hosts_try_prdr smtp "host list&!!" * .cindex "PRDR" "enabling, optional in client" -- 2.25.1