[Dovecot] Transparent IMAP proxy

Hi,

I'm considering patching Dovecot to work as a transparent (and virus scanning) IMAP proxy.

What is the appropriate feature to extend? (I've considered the following: IMAPC and reverse proxying, with IMAPC looking more promising since it actually parses IMAP communication).

Can anyone who is familiar with the IMAPC code recommend what are the most appropriate locations in the code to make the required changes? (I've considered hooking the storage virtual functions and making the settings local rather than global - but would appreciate more specific ideas).

Thanks.