[exim-cvs] Docs: add warning on use of envelope_to_add

Gitweb: https://git.exim.org/exim.git/commitdiff/730acb14092de4443ba3c5c38532f3ca9b3e75d3

Commit:     730acb14092de4443ba3c5c38532f3ca9b3e75d3
Parent:     86d51a7b1055b6fad9a4add3b42efd40328b5130
Author:     Jeremy Harris <jgh146exb@???>
AuthorDate: Sun Aug 8 00:19:43 2021 +0100
Committer:  Jeremy Harris <jgh146exb@???>
CommitDate: Sun Aug 8 00:19:43 2021 +0100

    Docs: add warning on use of envelope_to_add
---
 doc/doc-docbook/spec.xfpt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index cea21a1..f13e58b 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