Jsmtpd

In this release, code has been cleaned up and
refactored. It mainly includes several bugfixes in
the LDAP plugins and DNS resolver, and thread
usage was improved. New plugins have been added:
maildir writer, LMTP delivery (experimental), and
spf/greylist.

This release provides an improved core.
Additionnaly, error reporting has been improved
(original mail messages are now attached with
errors; reports are sent in case of temporary
failures). The core has been partially refactored
to Java 5.0 generics. This releases also
introduces a set of LDAP plugins: access control,
recipient rewriter, and authenticator.

This releases fixes bugs in the I/O code on a
minority of remote SMTP servers. The SMTP sender
protocol has been changed to handle specific bad
server responses. The DNS resolver plugin has been
fixed to resolve subdomain mail exchangers in case
of primary domain failure. There is also a first
implementation of an SMTP relay delivery plugin.
Finally, the documentation has been updated, based
on the development wiki drafts.

This release supports TLS (SSL) secured communications and SMTP authentication. The core has been modified to support common future SMTP extensions, and the documentation has been updated.