Re: warn about a BCC field

[Uwe Brauer <oub@mat.ucm.es>]

   > Uwe Brauer <oub@mat.ucm.es> writes:

   > No, mail user agents are supposed to strip the Bcc header before
   > sending, and that's what Gnus is doing, so everything works as it
   > should.

   > The whole point of the Bcc header is that isn't not supposed to be sent
   > out.

Again a misunderstanding the following 

,----
| From: Uwe Brauer <oub@mat.ucm.es>
| Subject: test bdd
| To: Uwe Brauer <oub@mat.ucm.es> 
| Date: Sat, 14 Apr 2018 00:10:57 +0200 (8 hours, 59 minutes, 22 seconds ago)
| Bcc: oub.oub.oub@gmail.com
`----

Is a header in my oub@mat.ucm.es

Mailbox, after receiving it. It is *not* a message I want to sent.


This is the header of a mail in my oub.oub.oub@gmail.com mailbox


,----
| From: Uwe Brauer <oub@mat.ucm.es>
| Subject: test bdd
| To: Uwe Brauer <oub@mat.ucm.es> 
| Date: Sat, 14 Apr 2018 00:10:57 +0200 (8 hours, 59 minutes, 43 seconds ago)
`----

When I do the opposite sent from my oub.oub.oub@gmail.com account to
oub@mat.ucm.es the bcc is no displayed. And this behavior is independent
from the MUA (gnus/thunderbird)