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-rw-r--r--doc/doc-docbook/spec.xfpt8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index cea21a18f..f13e58b79 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -22498,6 +22498,14 @@ header, Exim has a configuration option (&%envelope_to_remove%&) which requests
its removal from incoming messages, so that delivered messages can safely be
resent to other recipients.
+.new
+&*Note:*& If used on a transport handling multiple recipients
+(the smtp transport unless &%rcpt_max%& is 1, the appendfile, pipe or lmtp
+transport if &%batch_max%& is greater than 1)
+then information about Bcc recipients will be leaked.
+Doing so is generally not advised.
+.wen
+
.option event_action transports string&!! unset
.cindex events