From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Sat, 7 Aug 2021 23:19:43 +0000 (+0100)
Subject: Docs: add warning on use of envelope_to_add
X-Git-Tag: exim-4.95-RC2~13
X-Git-Url: https://git.exim.org/exim.git/commitdiff_plain/730acb14092de4443ba3c5c38532f3ca9b3e75d3?ds=inline

Docs: add warning on use of envelope_to_add
---

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