active (in the middle of a delivery attempt), it is not altered. This option
can be used only by an admin user.
-.vitem "&%-MC%&&~<&'transport'&>&~<&'hostname'&>&~<&'sequence&~number'&>&&&
+.vitem "&%-MC%&&~<&'transport'&>&~<&'hostname'&>&&&
+ &~<&'host&~IP'&>&&&
+ &~<&'sequence&~number'&>&&&
&~<&'message&~id'&>"
.oindex "&%-MC%&"
.cindex "SMTP" "passed connection"
.option pipelining_connect_advertise_hosts main "host list&!!" *
.cindex "pipelining" "early connection"
.cindex "pipelining" PIPE_CONNECT
-.cindex "ESMTP extensions" X_PIPE_CONNECT
+.cindex "ESMTP extensions" PIPE_CONNECT
If Exim is built with the SUPPORT_PIPE_CONNECT build option
this option controls which hosts the facility is advertised to
and from which pipeline early-connection (before MAIL) SMTP
See also the &%hosts_pipe_connect%& smtp transport option.
-Currently the option name &"X_PIPE_CONNECT"& is used.
+.new
+The SMTP service extension keyword advertised is &"PIPE_CONNECT"&.
+.wen
.option prdr_enable main boolean false
When a router runs, the strings are evaluated in order,
to create variables which are added to the set associated with
the address.
+.new
+This is done immediately after all the preconditions, before the
+evaluation of the &%address_data%& option.
+.wen
The variable is set with the expansion of the value.
The variables can be used by the router options
(not including any preconditions)
.option server_channelbinding gsasl boolean false
Do not set this true and rely on the properties
without consulting a cryptographic engineer.
+. Unsure what that's about. It might be the "Triple Handshake"
+. vulnerability; cf. https://www.mitls.org/pages/attacks/3SHAKE
+. If so, we're ok, requiring Extended Master Secret if TLS
+. Session Resumption was used.
Some authentication mechanisms are able to use external context at both ends
of the session to bind the authentication to that context, and fail the
When more than one address is included in a single delivery (for example, two
SMTP RCPT commands in one transaction) the second and subsequent addresses are
flagged with &`->`& instead of &`=>`&. When two or more messages are delivered
-down a single SMTP connection, an asterisk follows the IP address in the log
-lines for the second and subsequent messages.
+down a single SMTP connection, an asterisk follows the
+.new
+remote IP address (and port if enabled)
+.wen
+in the log lines for the second and subsequent messages.
When two or more messages are delivered down a single TLS connection, the
DNS and some TLS-related information logged for the first message delivered
will not be present in the log lines for the second and subsequent messages.