[Dovecot] Plugin question

[Valery Gorbunov]

Hi All

I needs to write plugin which converting messages by replacing entier
message by one of parts of this message. In
another words I need show part of multipart message instead entire message.
Stream substitution in *mail->v.get_stream()* function gives incorrect
results because mail indexed and cached before.
Therefore I should wrap email during indexing too.
something like:
-----
struct index_transaction_context * it;
it->ibox->mail_vfuncs->get_stream = convert_get_stream;
-----
Is it enough or idea to replace mail stream by another will don't work
anyway?

Could you suggest how to show one mail instead another in Dovecot
environment?

Thank you
Valery Gorbunov