PIPE_CONNECT: avoid using when the transport helo_data uses $sending_ip_address

[exim.git] / doc / doc-txt / experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 301152f1a91a77f6d6317f566b944703effa04da..328d0940a6e059dd403bcab5fedbf2a78570d6cc 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -941,6 +941,9 @@ change.
 
 NOTE: since the EHLO command must be constructed before the connection is
 made it cannot depend on the interface IP address that will be used.
+The string "$sending_ip_address" is checked for; if it appears in helo_data
+and "def:sending_ip_address" does not, the facility is disabled.
+
 Transport configurations should be checked for this.  An example avoidance:
 
  helo_data =   ${if def:sending_ip_address \