libmail-message-perl 3.012-1 (arm64 binary) in ubuntu kinetic

 A Mail::Message object is a container for MIME-encoded message information,
 as defined by RFC2822. Everything what is not specificaly related to storing
 the messages in mailboxes (folders) is implemented in this class. Methods
 which are related to folders is implemented in the Mail::Box::Message
 extension (included in the libmail-box-perl package).
 .
 The suggested packages are used by the various Mail::Message::Convert::*
 modules.