[Dovecot] Developer Documentation

Hi Everyone....

I Try to make a modification in dovecot Maildir system....

I want to include lines from another file into every email when the user request to read this email.

Is Like put some extras itens email. I try to find how to do this but what i understand is, every email is read "on the fly", but i dont find exactly where... i didnt find some "read" to do this.

Some one can help me to do this ?

Tks !