simple pop3 server in php

We need a rudimentary (but robust) pop3 implementation in php5.x. All emails and the username and password for email accounts need to stored as files. (No database). The directory structure should be user1 [login to view URL] messages <filename> // e.g., 982398293 ... ... usern Only the following commands need to be supported USER name PASS string QUIT STAT LIST [msg] RETR msg DELE msg NOOP RSET QUIT UIDL [msg] See <[login to view URL]> for pop3 RFC. The program needs to be implemented using php sockets. See <[login to view URL]> to learn how to implement sockets in php. See <[login to view URL]> for a nice example that doesnt require forking. The end result should be compatible with MS Outlook and Outlook express (i.e., I should be able to configure outlook [express] to retrieve the messages. All emails need to be stored as files. Since SMTP doesnt need to be implemented, allow the implementation to post messages through an http interface and also through a simple upload (dropping a file in the messages directory of a particular user). ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform PHP 5.x Windows and Linux (do not use any OS dependent code).