[Dovecot] duplicates with multiple To/CC and sieve redirect copy

[Timo Sirainen]

On 22.2.2012, at 0.46, Adam Szpakowski wrote:

> In one installation we are using sieve "redirect :copy" to create copy of the incoming email (local boss gets copy of its employees mails).
> There is a problem when the incoming email has multiple To/CC entries with local users. Multiple copy/redirects are created (one for each employee) and there are multiple copies in "boss" account.

Could this instead be implemented by MTA as automatic bcc: boss of all incoming mails?