perdition - 2.2-3.1+b1
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Perdition allows users to connect to a content-free POP3 or IMAP4
server that will redirect them to their real POP3 or IMAP4 server. This
enables mail retrieval for a domain to be split across multiple backend
servers on a per user basis. This can also be used to as a POP3 or IMAP4
proxy especially in firewall applications. Perdition supports arbitrary
library based map access to determine the server for a user. POSIX
Regular Expression, GDBM, Berkeley DB, MySQL, PostgreSQL, ODBC and LDAP
libraries ship with the distribution.