PDF preview in E-Mails

Many Fax to Mail Gateways send the document as an .pdf attachment. That ist ok, but not very comfortable on smart-phones, 'cause you have to download the hole document to see if it is important or junk. So we want an piece of software , running on Ubuntu doing the following: - accept mail on smtp-port 25 (via postfix preferred) - convert the attachet .pdf to one or multi jpeg with a low resolution i.e. 200x300px - lookup the senders e-mail adress in a table (simple textfile) to get the target address - send the jpegs an the original .pdf to target address, so smart phone e-mail clients would show the attachet .jpgs as a preview - add an entry to an logfile in csv-style (timestamp;sender;target;number_of_pages) The lookup-table should be an simple textfile i.e. (senders_email_address target_email_address) on the server will be no other e-mail services to take care of.