POP3 Server Implementation
==========================
Psi is a simple POP3 server implementation written in C.

Its configuration file consists of commands like:
  adduser $user $passwordhash $maildirpath
where $passwordhash is obtained by
  psi -h $password

Psi expects Maildir format and that mails are in the new directory.  It
doesn't move mails and in fact such functionality is rather needless
for a POP3 server.
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