Ondrej Zara wrote:
  

This is actually the case. In program/steps/mail/compose.inc on line 191
recipients that do match one of the user's identities are skipped.

Maybe you can debug this because it works for me.
      

I found the following code near line 191:

 // add recipent of original message if reply to all
    else if ($header=='cc' && !empty($MESSAGE->reply_all))
    {
      if ($v = $MESSAGE->headers->to)
        $fvalue .= $v;

      if ($v = $MESSAGE->headers->cc)
        $fvalue .= (!empty($fvalue) ? ', ' : '') . $v;
    }


First, the assignments in conditions are somewhat mystical to me (why?).
Second, this clearly adds original recipient to a 'cc' part of new
message. So, should I patch this only for myself or is this a newly
found bug?
    

Thomas Bruederli, 08.12.16 17:59:

Right but this list ($fvalue) is then checked later on.

However, it looks like this "bug" was introduced in
http://trac.roundcube.net/changeset/1782 when attempting to fix
http://trac.roundcube.net/ticket/1485337

I guess we could easily fix this by allowing "reply to myself" only in the
to-field and not in CC where the reply-all problem occurs.

~Thomas