Custom module Attach emails to Contacts, Organizations and Leads

I need a module for vtiger for attaching emails, so by configuring the imap or webmail to vtigerwhich it does: --Attaches the sent and received emails where the email is from a contact, organization or lead. -It should scan all emails in all folders, not only inbox or sent items. -If the email is not there, it shouldn't create any contact or lead. -be able to list all emails that are attached in the vtiger, by received or sent items, with name of company, subject and date. Note: the mail converter does not work very well, so that's why we want it personalised. We are currently using ondemand vtiger.