[Dovecot] Using dovecot proxy as multi-account aggregator?

Good day.

I am trying to build a rather weird setup. The basic idea is to have a relatively simple IMAP client and let dovecot do the actual connections. So far both the documentation and my trials on this front have been rather fruitless.

The desired components:

• 1 dovecot server, acting as a proxy
• 1 master account
• 1 client connection
• 0 "real" user accounts, so no local mail storage at all
• N real accounts, spread over different domains
• mails from different remote accounts combined to the single client connection
• outgoing server for mails selected by the address of the remote account

Since the proxy setup can use name@domain.tld as destination user, it would appear that the setup is not impossible. Hence my two questions:

1. Is it possible?
2. If yes, how in the name of all that is good and holy do I configure that?

And believe me, I am fully aware that for most setups a full-featured client or fetchmail would be the easier path.

Thank you for any and all help in advance,

-- Mika Boström / mika.bostrom@nomovok.com