Sorry, did not notice at first, that this is the english mailing list. I have a problem with configuring postfix so that it does virtual mapping and then delivers via dovecot. I have described it in a forum post on server fault: http://serverfault.com/questions/207342/postfix-virtual-mailbox-mapping-and-dovecot
The problem is, that the ${user} in master.cf does not result in the virtual-mapping-result but in the first part of the original adress (as in u...@example.org). Is it possible to have both: virtual mapping and "external" delivery? Thanks for your help! Marius Melzer