courier-mta 0.57.0-1ubuntu1 (powerpc binary) in ubuntu hardy

 This ESMTP daemon uses an efficient maildir format as its native storage
 format, supports IPv6, implements SMTP extensions for mailing list
 management and features integrated mail filtering. It can function as an
 intermediate mail relay, relaying mail between an internal LAN and the
 Internet, or perform final delivery to mailboxes.