Problem Statement: Understand implementations of email protocols used to download or access
                   mailbox's on a server ...

                   keeping aside inconsistencies of having a mailbox on server ...refer to
                   ideal implementation of email as a viable utility.

Opportunity a):  enhance POP the ability to synchronize the mailbox ...given the capabilities offered by a server.

              scope for POP or IMAP4  or any other protocol to give the user the ability to
              download only those mails that have attachments enclosed with them!! ...

              or if offered by capabilities of a email-server ...a email client ...that provides
                 the interface to achieve the above


Opportunity b): secure data tranmission and transfers to mailbox and clients ...is provided by various protocols
                like secure-pop or ssl-enabled-imap4

               ability to encrypt , decrypt and also securely do data-transfers between mailbox's-mailclients

               using ssh-handshake or pgp handshake kind of process by implementing ...
               front-page extension authentication kind mechanisms over the mailbox or the virtual-luns on the server-side

Opportunity c); Further to as published and envisaged in the document projects.pdf ...viz. that of extensions to email based on DNS,

                a better and secure-means of communication can be implemented ...based on ssh/pgp handshakes

                ...viz. ability to integrate DNS around the PGP circulation of public-keys ...encryption and decryption process
   
                ...ideally ability to look-up a user or entity from mail-client on the lines of directory-lookup

                or ability to integrate Directory lookup with DNS ( or viceversa ...subject to use-case modelling 
                   or rationalization ...rational-roze modelling process methodology may be ??) ??

Opportunity d) further to as published in document below ...when broadcasting or send mail to multiple users on the same domain

               ability to save on typing ...a better nomenclature to be implemented for resolving the addresses

               say xyz,xxx,abc@domain.com or some standard protocol or norm to be adopted
 
                            

Note: The above problem statement having been encountered in various scenarios
      and detailed in various 'Proof of concepts' as mentioned in 
      'http://uk.geocities.com/ravivenkatus/projects.pdf' ....apply appropriate
      'use-case' modeling, rationalize and arrive at a workable and feasible 
       solution both commercially and techinically viable.