Archiveopteryx stores email in a database and provides access to it through IMAP and more.
archiveopteryx is an internet mail server, optimised to support longterm archival storage. it seeks to make it practical not only to manage large archives, but to use the information therein on a daily basis instead of relegating it to offline storage.
archiveopteryx runs on linux, freebsd, netbsd, openbsd and mac os x. the source code is written in core c++, using very few libraries, and compiles without any warnings.
archiveopteryx's unique advantages include:
scalability searching and categorisation interoperability and standards compliance stable, longterm archival storage security easy administration
imap pop3 mail-server postgresql sasl