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-rw-r--r--doc/doc-docbook/spec.xfpt3
-rw-r--r--doc/doc-txt/ChangeLog3
2 files changed, 6 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index b0b1585fe..af57d9b85 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -20717,6 +20717,9 @@ headers that some sites insist on.
This option sets up a filtering (in the Unix shell sense) process for messages
at transport time. It should not be confused with mail filtering as set up by
individual users or via a system filter.
+.new
+If unset, or expanding to an empty string, no filtering is done.
+.wen
When the message is about to be written out, the command specified by
&%transport_filter%& is started up in a separate, parallel process, and
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 4e5663fab..2caae227c 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -73,6 +73,9 @@ JH/14 Change header file name for freeradius-client. Relevant if compiling
JH/15 Bug 1712: Introduce $prdr_requested flag variable
+JH/16 Bug 1714: Permit an empty string as expansion result for transport
+ option transport_filter, meaning no filtering.
+
Exim version 4.86
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