sender_bcc_maps and double emails in archive

[Curval]

I have used the HOWTO " Users and Domains with Postfix, Courier,......" to setup my persoanl email server. I didn't have any problems to install the server. After it worked, I installed the command

sender_bcc_maps = .....

to make a copy of every outgoing email to an ARCHIVE. (mail account)

Finaly I'm now getting double emails of every sent email in my ARCHIVE.

After seachring the forum and web, I added the command:

receive_override_options = no_addreess_mappings to the master.cf.

This had the effect, that I now do not receive any copy of outgoing mail in my archive ?

Can anyone help me ?

Regards

Michael