X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/24ca4cf3b0f5e02735ea716163a880b2b5cc8b49..3c751489b2aca846fe2305a6a3d189381579b61e:/man/post.man

diff --git a/man/post.man b/man/post.man
index e49d10bf..39e66f60 100644
--- a/man/post.man
+++ b/man/post.man
@@ -89,9 +89,12 @@ components that contain addresses.
 .PP
 If a \*(lqBcc:\*(rq field is encountered, its addresses will be used for
 delivery, and the \*(lqBcc:\*(rq field will be removed from the message
-sent to sighted recipients.  The blind recipients will receive an entirely
-new message with a minimal set of headers.  Included in the body of the
-message will be a copy of the message sent to the sighted recipients.
+sent to sighted recipients. The blind recipients will receive an entirely
+new message with a minimal set of headers. The body of this new message
+will contain a copy of the message sent to the sighted recipients, either
+marked up with the indicator text "Blind-Carbon-Copy" or encapsulated
+as a MIME digest.
+.PP
 If
 .B \-filter
 .I filterfile
@@ -104,6 +107,28 @@ switch is given, then
 .B post
 will use the MIME rules for encapsulation.
 .PP
+If a \*(lqDcc:\*(rq field is encountered and the
+.B sendmail/pipe
+mail transport method is not in use, its addresses will be used for
+delivery, and the \*(lqDcc:\*(rq field will be removed from the message. The
+blind recipients will receive exactly the same message as the sighted
+recipients. *WARNING* Recipients listed in the \*(lqDcc:\*(rq field receive no
+explicit indication that they have received a \*(lqblind copy\*(rq.
+This can cause blind recipients to
+inadvertently reply to all of the sighted recipients of the
+original message, revealing that they received a blind copy.
+On the other hand, since a normal reply to a message sent
+via a \*(lqBcc:\*(rq field
+will generate a reply only to the sender of the original message,
+it takes extra effort in most mailers to reply to the included
+message, and so would usually only be done deliberately, rather
+than by accident.
+.PP
+.B post
+rejects any message that contains a \*(lqDcc:\*(rq field if the
+.B sendmail/pipe
+mail transport method is used.
+.PP
 The
 .B \-alias
 .I aliasfile